ST] •397 .L6B7 Book < L 6l3 7 UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 1007 Contribution from the Forest Serric« WILLIAM B. GREELEY, Forester Washington, D. C. PROFESSIONAL PAPER June 5, 1922 UTILIZATION OF BASSWOOD By WARREN D. BRUSH, Scientific Assistant CONTENTS Page Introdnction 1 Properties of tlie Wood 2 Supply 6 Annual Drain on the Supplr 6 The Future of Basswood Timber 8 Utilization by Industries 8 Markets 52 Summary 56 Appendix : Classified List of Uses Reported for Basswood by Factories . 68 WASHINGTON GOVERNMENT PRINTING OFFICE 1922 \ LIBf^RY OF CONGRESS*^ RECEIVED NnV8-1922 DOCUIVieNTS JJiViJION UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 1007 Contribution from the Forest Service WILLIAM B. GREELEY, Forester. Washington, D. C. PROFESSIONAL PAPER June 5, 1922 UTILIZATION OF BASSWOOD By Warren D. Brush, Scientific Assistant. CONTENTS. Page. Introduction 1 Properties of the wood 2 Supply 5 Annual drain on the supply 6 The future of basswood timber S Utilization by industries 8 Markets 52 Summary 58 Appendix: Classified list of uses reported for basswood by factories 58 INTRODUCTION. Basswood is one of the important commercial timbers of the United States. Nineteen other woods are manufactured into lumber in larger quantities, and factories using lumber for the manufacture of various wooden products consiune larger quantities of about 12 other woods, including yellow poplar and white pine, which are often used for the same general class of products as basswood and are frequently substituted for it. Basswood is valued mainly for its white color, light weight, and good working qualities. It is well adapted for certain special uses for which other woods do not serve as well, and, because of the comparatively small supply now available, it is greatly in demand for these purposes. Basswood is valued highly for products made of wood in the natural state, particularly where a clean, attractive appearance and light weight are essential. Boxes and woodenware used for holding food are the main products. Basswood lumber is manufactured from several species, but mainly from the species Tilia americana, which grows over nearly all of the eastern part of the United States. Other common names for this tree are linden, linn, bass, limetree, whitewood, and beetree. The species Tilia heterophyUa , which is most commonly called white bass- wood and is found mainly in the Allegheny Mountain region, also 64281°— 22— Bun. 1007 1 2 BULLETIN 1007, U. S. DEPARTMENT OF AGRICULTURE. produces basswood lumber, principally in West Virginia, which is similar to that of Tilia americana. There are several other species of basswood in the United States, all of which have wood similar to the common basswood species, but contribute only small quantities of the timber. As the wood of these different species is very much alike, it is not kept separate in the market and is sold as basswood. PROPERTIES OF THE WOOD. GENERAL APPEARANCE. The heartwood of basswood is creamy brown with occasional darker streaks. The sapwood is wide and not sharply defined from the heartwood. The wood has a very uniform appearance; the sap- wood and, particularly, rapid-growth timber has a light-colored, clean look very desirable for special piu'poses. Basswood occasionally shows a curly growth, especially near the butt of the tree, which gives it an attractive appearance. This is unusual, however, and the wood does not normally possess a curly grain nor any figure, such as is found in oak and birch, for instance. It is therefore painted a uniform color or stained to imitate some other wood, when used for such purposes as inside house finish and the exterior woodwork of furniture. PHYSICAL AND MECHANICAL PROPERTIES. Basswood timber is light in weight, soft in texture, straight-grained, and has low strength values and poor shock-resisting ability in general comparison with other woods. Compared on the basis of density or weight, basswood has nearly average values for most of its properties but has slightly greater stiffness and much greater shrinkage for its density than the average. In the classification of woods by the Forest Products Laboratory of the Forest Service into eight groups, according to results of tests for each of six physical and mechanical properties, basswood is described as follows: Property: Classification. Density or weight Light. Strength as a beam or post Weak. Hardness Soft. Shock-resisting ability Poor. Stiffness Moderately limber. Shrinkage Moderate. Table 1 shows actual and comparative properties of basswood timber, as determined by the Forest Service from a very large number of tests. White oak is the wood generally used as a basis for com- parison of properties. The composite values given are a combination of several kinds of tests. The hardness value of basswood is very low compared with white oak on this basis. This is also true of the different strength values, particularly shock-resisting ability. UTILIZATION OF BASSWOOD. Table 1. — Actual and comparative properties ofbasswood timber. /Pennsylvania. ' 1 Wisconsin . Locality where grown Weight per cubic foot: Green pounds. . 41 Air-dry do 26 Kiln-dry do 25 Specific gravity, oven-dry, based on volume when green 0. 325 Shrinkage from green to oven-dry condition : In volume (1 ) per cent. . 15. 8 Radial (2) do 6.6 Tangential (3) do 19. 3 Comparative shrinkage (twice volume plus radial plus tangential divided by 3) per cent. . 15. 8 Strength in bending at 12 per cent moisture: (4) Modulus of rupture pounds per sq. in . . 836. 5 Relative strength compared with white oak (white oak = 100) 56 Strength in compression parallel to grain at 12 per cent moisture: (5) Maximum crushing strength pounds per sq. in. . 4, 542 Relative strength compared with white oak (white oak=100) 62 Shearing strength parallel to grain at 12 per cent moisture: (6) Shearing strength pounds per sq. in. . 1, 000 Relative shearing strength compared with white oak (white oak=100) 49 Composite values: Strength as a beam or post 6, 350 Compared with white oak (white oak=100) 61 Hardness 284 Compared with white oak (white oak=100) 27 Shock-resisting ability 5. 48 Compared with white oak (white oak=100) 42 Stiffness 1, 231 Compared with white oak (white oak=100) 81 Note. — Each of the composite values given in this table is a weighted average of several values derived from different kinds of strength tests. For instance, strength as a beam or post is a combination of values derived from tests in static bending, impact bending, and compression parallel to grain. __J l=iiivolimie; 2=radial; 3=tangential: 4=strength in bending; 5=strengthui compression parallel to grain; 6=shearing strength parallel to grain. Table 2 gives the relative properties of yellow poplar, cottonwood, and white pine compared with basswood, since these three woods are often put to the same uses as basswood. This table indicates that basswood is softer than any of these woods, also lighter in the oven- dry condition. In the green condition basswood is heavier than either yellow poplar or white pine because of the higher moisture content of the basswood. Cottonwood, however, is much heavier than basswood when green. Air-dry material of these four species does not differ greatly in weight. Basswood shrinks more than the other species given and its strength values are, in general, lower. 4 BUULETHnT 100*7, IT. S. DEPARTMENT OF AGRICULTUBE. Table 2. — Properties of yellow poplar, cottonwood, and white pine compared with basswood. Basswood=lOO. Weight. Shrinkage from green to oven-dry condition. Strength at 12 per cent mois- ture. Composite values. Species. Oven- dry (spe- cific grav- ity.) Air- dry. Green In vol- ume. Ra- dial. Tan- gen- tial. Mod- ulus of rup- ture in bend ing. Compres- sion par- allel to grain (maxi- mum crushing strength). Strength as a beam or post. Hard- ness. Shock-, resist- i Stiff- ing 1 ness. ability Yellow poplar.. Cottonwood WTiitepine 112 112 109 104 108 104 93 120 95 72 89 49 62 59 33 74 99 63 105 96 102 Ill 105 119 114 102 116 128 119 128 103 134 109 116 98 100 Basswood is rated low in durability. The estimated average life of untreated basswood lumber, under conditions subjecting it to deca3^ but not to mechanical wear, is placed at from 3 to 5 years. Its length of life in any particular case may, of course, vary from this, depending on conditions. If properly treated with coal tar creosote, or some other standard preservative, its durability may be greatly increased.^ ° STRUCTURE. Basswood is a diffuse-porous wood (PL I). The pores are about uniform in size and quite evenly distributed throughout the annual- growth ring. They are, however, somewhat less numerous near the outer limits of each annual ring, and this makes a contrast with the greater number of pores at the beginning of each ring so that the growth rings can be quite readily distinguished on a smoothly cut transverse section. Medullary rays are generally not conspicuous on longitudinal surfaces; in some pieces, however, they are reddish and quite conspicuous on a quarter-cut surface; on a smoothly cut trans- verse section they can be readily distinguished without the aid of a lens. roENTIFICATION. In appearance basswood resembles somewhat yellow poplar, cottonwood, buckeye, and tupelo. The yellow poplar, however, can be distinguished by its yellowish-brown heartwood, which has a characteristic greenish tinge. In cottonwood the medullary rays are very fine and barely visible even with a hand lens on a smoothly cut transverse surface, in contrast to those in basswood, which are visible to the unaided eye; the pores of cottonwood are conspicuously larger than those of basswood, as seen under a hand lens, and cotton- wood generally has a "woolly" texture on sawed surfaces. In buckeye and tupelo the rays are also finer than in basswood. The brownish-black, longitudinal streaks occasionally found in the heart- wood help to distinguish basswood. 1 Farmers' Bulletin 744, Preservation of Farm timbers, gives methods of treatment. UTILIZATION OF BASSWOOD. SUPPLY. Basswood timber, grows in the eastern half of the United States, but it is not important near the Atlantic coast south of New England nor in the GuK Coast States. The estimated stand of basswood is given by regions in figure 1. The New England region contains approximately 666,000,000 board Fig. 1.— Estimated stand of basswood by State groups. feet of timber, or 7 per cent of the supply. The middle Atlantic region, made up of the States of New York, Pennsylvania, New Jersey, Delaware, and Maryland, contains a trifle more. The Lake region, the most important region, contains more than one-half of all the basswood in the United States, or about 5,082,000,000 board feet. The second most important region, the central region, whose BtrULETIN 1007, V. S. DEPARTMENT OF AGRICXJLTUEE. greatest producing States are West Virginia, Tennessee, and Ken- tucky, contains a quarter of the basswood, while the South Atlantic and East Gulf and lower Mississippi regions contain less than 5 per cent of the supply. The region shown in figm-e 2' is estimated to contain about 98J per cent of the total amount in the United States. PRINCIPAL REGION OF GROWTH OF BASSWOOD TIMBER Fig. 2. — Principal region of growth of basswood timber (shaded area). ANNUAL DRAIN ON THE SUPPLY. The total present annual demand for basswood timber is difficult to determine, because of a lack of statistics for some of the industries using basswood logs as raw material. The total basswood lumber production for 1920 is placed at 195,000,000 board feet. Reports on veneer production in 1919, which are the latest available data, give 11,134,000 board feet, log scale, of basswood consumed in that year, UTILIZATION OF BASSWOOD. 7 equivalent to about 13,000,000 board feet of lumber. In 1911, 33,042 cords of basswood were reported for excelsior, ec^uivalent to about 16, 500, 000 board feet of lumber. Whether amounts now consumed are greater or less than these figures, and how much, can not be stated with certainty, because, although the demand for products of basswood from these industries has increased greatly, the supply of the timber has been more restricted in recent years. It is not safe, therefore, to assume any increase over these figures, especially since the sawmill cut of basswood lumber has suffered a considerable reduction during the period. Constant inroads have been made into the remaining stands of basswood to fulfill the increased demand. Smaller and in some cases second-growth timber has been cut so that both quantity and quality have been lowered. Pulpwood statistics are available for the year 1920. The bass- wood reported as used for pulpwood during that year totaled 10,469 cords, equivalent to about 5,000,000 board feet of lumber. The number of sets of basswood slack-cooperage heading reported manufactured during the year 1919 was 3,078,000, ec^uivalent to a little more than 6,000,000 board feet of lumber. These differ- ent items, which make up practically the entire demand for bass- wood timber, total about 235,000,000 board feet. It is probable, therefore, that the present annual drain upon the supply amounts to between 225,000,000 and 250,000,000 board feet. Assuming it is 250,000,000 board feet, the aggregate stand of basswood saw timber shown in figure 1 (9,012,000 board feet) without taking into con- sideration the growth that may take place during the period, will last approximately 40 years. If we are to continue using basswood provision will have to be made for growing trees to take the place of those cut. Natural growth not protected from fires while young will not fill the requirement gap toward the close of the 40-year period. Little basswood is used for rough building construction, because it is not so strong as many lower-priced structural timbers, and it is not satisfactory in locations favorable to decay. Also, compara- tively small quantities are used for fuel, because its heating value is low compared with other woods, such as beech and oak. Reports from wood-using industries of the United States obtained during the years 1909 to 1913 show an annual consumption of approximately 370,000,000 board feet of basswood lumber by factories. Adding to this the timber used for veneer, excelsior, pulpwood, and slack cooperage, brings the total to over 400,000,000 board feet, compared with 225,000,000 or 250,000,000 board feet, the probable present amount used. Evidently there has been a considerable reduction in the amount of basswood used during the past 10 years. 8 BULLETIN 1007^ U. S. DEPARTMENT OF AGRICULTURE. THE FUTURE OF BASSWOOD TIMBER. The future of basswood depends upon provision made for new growth, Basswood is a very desirable tree to grow especially for the small timber owner who has a tract of woodland which he wishes to keep permanently forested. It is easily propagated, increases in size rapidly in comparison with other species, and is marketable in various forms. Rapid-growth timber yields the largest amount of the white sapwood, which is highly valued. The tree grows well on deep, fresh or sandy loams, and has been known to grow rapidly and thriftily on very porous upland soils. It is generally a hardy tree, although on heavy upland soils it not only grows slowly but is likely to suffer injury during dry periods. The most favorable region for its growth is the northeastern part of the United States. In the virgin forest, basswood often reaches a height of 90 to 100 feet and a trunk diameter of 3 or 4 feet. When crowded by other trees it forms a straight stem, with but few branches, which are near the top (PL II) ; but when grown in the open the stem is short and there are many large branches. Basswood is one of the most prolific of our native trees in its sprout- ing capacity. The sprouts arise from the stump and afford a prac- tical means of renewing basswood as a timber crop (PL III). To obtain vigorous sprouts the trees should be felled between November and March. The stumps should be cut low, so that the sprouts will start close to the ground, where they can soon develop a root system of their own and become self-supporting; otherwise, decay from the stump of the old tree is likely to enter them. Sprouts generally grow more rapidly than seedlings. For the production of small- diameter material, such as excelsior and pulpwood bolts, propagation by sprouting affords an excellent method of obtaining a timber crop in a comparatively short time. The tree generally does not suffer severe injury from insect attack. Cattle like to browse upon the young twigs and leaves, however, and should be excluded from the young growth. UTILIZATION BY INDUSTRIES.^ Wood-using industries generally belong in one of two classes, based on the form of raw material used: (1) Those which depend entirely upon the log or bolt, and (2) those which use mainly lumber or dimen- sion stock for further manufacture into various products. The former class is termed primary and the latter secondary. 2 Because of the low fuel value of the wood, basswood stands are of relatively inferior value as a source of firewood. As a shade tree and for ornamental planting, basswood is well liked because of its large crown and dense foliage. The tree is also valued very highly by beeksepers for the flowers, which are borne In great profusion. 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S. DEPARTMENT OF AGRICULTURE. Table 4. — Number of mills in the different States reporting manufacture of basswood lumber iti different years arranged in order of lumber cut for 1918. State. 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 Total. 14,326 j6,973 5,423 5,130 5,217 3,336 3, 129 2,548 2,102 2,202 2,372 Wisconsin... Michigan W . Virginia - . New York Virginia... Tennessee Indiana Ohio N. Carolina .. Kentucky Pennsylvania Vermont Minnesota Maine Maryland N.Hampshire Iowa Massachusetts Connecticut Arkansas- . . Illinois Missoui'i . . Georgia . . . Alabama. . Louisiana . Te.xas New Jersey . Oklahoma. . Mississippi . . AH other 3.... 627 548 295 (^) 98 173 294 404 125 191 468 260 230 135 18 108 77 74 54 12 42 47 19 (a) (a) 619 (a) 4 3 10 2 763 737 422 1,323 174 191 392 575 180 215 508 280 352 144 44 93 181 93 58 27 111 11 16 li (a) 16 1 631 583 348 948 171 143 249 447 141 207 379 280 264 118 22 111 60 58 12 14 17 (a) (a) 538 517 340 1,067 147 151 231 393 122 160 378 279 240 136 18 17 (a) (a) 572 486 326 1,025 107 146 250 460 153 152 430 279 251 154 17 83 109 52 36 9 17 64 6 19 (a) (a) (a) 375 277 165 1,183 74 99 121 205 65 130 174 128 124 56 10 17 46 17 14 (a) 12 23 3 7 (a) (a) 298 189 240 1,008 61 126 137 198 71 162 219 143 88 60 6 34 13 22 15 3 5 17 (a) 11 (a) (a) (a) 286 213 191 71 142 191 56 220 177 73 82 7 48 49 29 15 (a) 5 16 (a) 8 4 .(a) 5 (a) 3 6 269 217 187 708 57 59 142 174 87 99 195 163 10 13 3 5 (a) (a) 4 (a) (a) 273 197 161 638 73 82 128 174 87 82 196 174 70 55 5 31 42 19 12 7 9 17 (a) 259 162 141 539 57 63 100 138 65 65 140 117 77 44 30 28 22 12 9 4 9 (a) (a) (a) 3 3 (a) (a) 251 158 137 532 56 (a) (a) 141 (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) 225 154 138 679 56 70 122 165 66 99 153 127 104 (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) (a) 214 1 Not including mills in New York. 2 Not reported. 3 Includmg Florida, Kansas, Rhode Island, South Carolina, and those marked "a." Table 5. — Percentage of basswood lumber manufactured by different classes of mills in 1918, also number of mills in different classes reporting. [Class 5 includes mills cutting 10,000,000 board feet and over per year; class 4, mills cutting from 5,000,000 to 9,999,000 board feet per year; class 3, 1,000,000 to 4,999,000 board feet; class 2, 500,000 to 999,000 board feet; class 1, 50,000 to 499,000 board feet.] State. United States Wisconsin Michigan West Virginia New York Virginia Tennessee Indiana Ohio North Carolina Kentucky Pennsylvania Vermont Minnesota All other States Total. 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 S3 259 162 141 539 57 63 100 138 65 65 140 117 77 179 Class 5. 104 Class 4. 13 26 38 1 172 35 <26 14 Class 3. 15 7 22 17 13 13 2 78 3 35 28 43 20 17 6 20 26 267 Class 2. 327 Class 1. 122 73 45 449 22 33 50 80 31 33 92 79 65 109 1 Includes cut of 1 mill in class 5. 2 Includes cut of 1 mill in class 4. 3 Includes cut of 2 mills in class 4. < Includes cut of 2 mills in class 5. ' Includes cut of 1 mill in class 5 and 1 mill in class 4 . UTILIZATION OF BASSWOOD. 15 Table 4 gives the number of mills in the different States reporting the manufacture of basswood lumber in different years. New York, Pennsylvania, Vermont, Ohio, and Indiana produce relatively small amounts in proportion to the number of mills cutting basswood. Wisconsin and, to a lesser degree, Michigan produce relatively large amounts per mill cutting basswood. Table 5 shows the proportionate amounts of basswood lumber manufactured by different size-classes of mills in different States in 1918. There has been a great reduction in the number of mills sawing basswood lumber for the last few years, particularl}^ in Ohio, Indiana, and Pennsylvania, which indicates that the timber is largely cut out in those States. Manufacture. — In sawing basswood lumber from the log, manufac- turers generally try to get wide, clear stock, for which there is a demand. Such stock 2^ and 3 inches in thickness is often wanted for special uses. Basswood lumber that is all white brings a better price than when the brown wood is mixed with it. Practically all basswood logs have a discolored central portion (PI. IV, a), and lumber manufacturers generally saw as much wide, clear, white stock as possible from two sides of the log down to the discolored wood. Narrower stock is then sawed from the other two sides. Logs with large hollow or defective centers are sawed simi- larly. Such logs will yield as much according to the log scale as sound logs, because, in scaling, the central defective portion is de- ducted. The sound wood in such a log is often entirely clear; and, since the whiter wood is toward the outside, these logs generally produce a large percentage of high-grade stock. Probably the most common thicknesses of basswood lumber manufactured are 1, 2^, and 3 inches. The quantities of different grades of basswood lumber sawed from logs naturally depend on the size and quality of the timber. Reports from several large mills in northern Michigan and Wisconsin indicate that the average proportions of different grades of basswood lumber produced are about as follows: Grades: Percent. Firsts and seconds 25 No. 1 common 30 No. 2 common 25 No. 3 common 20 The principal defects found in basswood lumber are black and rotten streaks and rotten knots (PI. IV, b, c, d, e). Basswood timber has few knots, however, in comparison with most other hardwoods. The dark, brown-colored wood near the center of the log is not val- ued so highly as the light-colored wood, even though it may be per- fectly sound and clear of defects (PI. IV, a, b). Discoloration also often takes place in the white wood, which reduces its value. This 16 BULLETIN 1007, U. S. DEPARTMENT OF AGRICULTUBE. discoloration does not take place so readily in cold weather, and for this reason basswood is cut by some firms mainly in the winter or late fall. Some manufacturers claim that where the lumberyard is kept in proper condition, well drained and free from undergrowth, there is little trouble from the staining of basswood, whether cut in winter or summer. It is a common practice not to separate the white basswood from the brown until it has been air-dried for 6 sum- mer months. The "stickers," or strips, used in piling lumber to keep the boards apart for drying may leave a discolored strip or band in basswood which is not removed in planing and lessens the value of the white wood for certain purposes. This is overcome by some firms by end-drying the lumber or pole-drying it for a week or two and then placing it in a "stuck" pile. In end-drying, the boards are placed on end under a specially built shed with stickers arranged horizontally at specified distances. Such a pile presents the appear- ance of an ordinary lengthwise lumber pile set on end. In this method the stickers are not brought into such close contact with the boards, since there is no weight or pressure. In pole-drying, the boards are piled almost vertically, crossing each other and supported by a strip of timber on which the lower edge of each board rests (PL V, figs. 1 and 2) . Labor costs are greater in pole-drying than in the ordinary methods of piling lumber. Basswood logs are very closely utilized in manufacturing into lum- ber, especially the outer clear, white, sound wood. Even the strips edged from the boards and called "bark strips" are often piled together and placed in stock. These bark strips are generally 1 inch thick and 2 to 4 inches wide, although some may be as wide as 6 inches. If of good color and free from defects, this stock is valuable to factories making small articles. Small strips of low-grade wood about 3 feet in length are sometimes sawed out and sold for crating. Sawmill operators generally find it more profitable to manufacture lumber from their basswood logs than to sell the logs to factories. Grades and prices. — Basswood logs are often separated into two grades. No. 1 or veneer logs, and No. 2, which is below the No. 1 grade. Veneer logs must be quite clear and of good form for rotary cutting. They must be at least 1 1 inches in diameter at the small end. No. 2 logs can be as small as 6 inches in diameter at the small end. The National Hardwood Lumber Association grading rules for bass- wood lumber apply also to soft elm, soft maple, and buckeye. There are six grades: Firsts, seconds, selects, No. 1 common. No. 2 common, and No. 3 common. Firsts must be 6 inches and over wide, 8 feet and over long. Pieces 4 to 9 square feet in size, surface measure, must be clear; pieces 10 to 15 square feet may have one standard defect or its equivalent; and Bui. 1007, U. S. Dept. of Agriculture. Plate V. Fig. I. — Framework Used in Pole Drying. Fig. 2. — Method of Pole-Drying Basswood Lumber. Bui. 1007, U. S. Dept. of Agriculture. Plate VI. UTILIZATION OF BASSWOOD, 17 pieces 16 square feet and over may have two standard defects or their equivalent. Seconds are also 6 inches and over wide, and pieces can have from one to five standard defects or their equivalent for from 5 to 20 square feet, surface measure, as specified. Firsts and seconds are generally combined as one grade, called "firsts and seconds" and designated as FAS. In this combined grade there must be at least 20 per cent of firsts. Lengths are 8 to 16 feet, and there must be not more than 20 per cent under 12 feet long and not more than 10 per cent 8 and 9 feet long. The grade " selects" includes pieces 4 inches and over wide and 6 feet and over long, with not more than 30 per cent under 12 feet long and not over 5 per cent of 6 and 7 foot lengths. In general the best face of pieces in selects must grade not below seconds and the reverse face not below No. 1 common. Admission into this grade also depends on amount of waste caused by defects in each piece. Nos. 1, 2, and 3 common grades include pieces 3 inches and over wide and 4 feet and over long. No. 1 common must have not to exceed 5 per cent of 3-inch widths, with not over 30 per cent shorter than 10 feet, and not to exceed 10 per cent of 4 and 5 foot lengths. Pieces 4 and 5 feet long, also pieces 3 and 4 inches wide and 6 and 7 feet long, must be clear of defects. Other pieces must work at least 663 per cent clear face in from one to four cuttings of specified mini- mum sizes, depending on the dimensions of the pieces. No. 2 com- mon must have not more than 10 per cent of 4 and 5 foot lengths. Pieces must work at least 50 per cent sound in not more than three to five cuttings, depending on the size of the piece. Cuttings must be at least 3 inches wide by 2 feet long. Pieces in No. 3 common grade must contain at least 25 per cent of soimd cuttings, each of which must have a minimum width of 1^ inches and a minimum surface area of 36 square inches. It is specifically noted in these rules that black spots and black streaks are defects in all grades, and care must be exercised in estimating their damage, for if any piece has an excessive amount its grade will be lowered. Table 6 gives average stumpage values of basswood timber for the years 1907 and 1912. These are averages of reports from a large number of timberland owners. Table 7 gives prices based on many reports of actual sales of stumpage in 1912. Prices of maple, birch, and beech are included for comparison. Reports obtained on stump- age sales in 1920 indicate a considerable increase in prices. Selling prices for Michigan and Wisconsin averaged SIO, and an average selling price of $19.40 was reported on sales of basswood stumpage in Ohio. This high figure for Ohio probably includes small lots of choice timber. Reports on sales in States where the timberland has been largely cut over show much variation in price. Basswood is generally purchased together with other hardwood timber, such as 64281°— 22— Bull. 1007 3 18 BULLETIN 1007, U. S. DEPARTMENT OF AGRICULTURE. yellow poplar, maple, and oak, with which it is found in mixture, and the price varies greatly. Prices ranging from $2,50 to $10 a thousand board feet for mixed stands were reported from Kentucky, Tennessee, and West Virginia. The average value of basswood lum- ber per 1,000 board feet f. o. b. mills, obtained from reports of saw- mills on lumber production, is given in Table 8, by States, for those years in which the data were collected. With the exception of the years 1909, 1911, and 1915, this table shows a continuous increase in value; increasingly higher values are shown since the year 1915. Average prices in Kentucky, Tennessee, and North Carolina are gen- erally $1 or $2 a thousand board feet below the average. Table 6. — Average stumpage values of basswood for 1907 and 1912, from reports on values from timberland owners. 1907 1912 Northeastern States: Maine New Hampshire. Vermont New York Pennsylvania S5.80 6.25 4.96 8.31 7.59 (20) (18) (27) (21) (41) $6.04 (48) 7.56 (23) 6.90 (25) 8. 51 (88) 8.14 (61) Average of 5 States. North Central States: Ohio Indiana Average of 2 States. Southern Appalachian States: Maryland , Virginia , West Virginia Kentucky Tennessee North Carohna , 6.68 (127) "7.68 (245) 9.59 (27) 10.83 (27) 11.59 (59) 11.22 (43) 10.21 (54) 11.43 (102) 4.50 3.33 3.91 4.46 4.04 1.67 (3) (6) (43) (3) (12) (6) 4.50 6.33 4.11 4.62 4.22 3.30 (4 (4) (9) (25) (18) (23) Average of 6 States. 3.75 (73) Lake States: Michigan — Upper Peninsula Lower Peninsula Southern tier of counties . State average Wisconsin. Minnesota 5.61 8.95 1.67 8.26 6.59 5.50 (23) (59) (6) (88) (65) (10) Average of 3 States. 7. 42 (163) 4.16 (82) 9. 57 (86) 7. 12 (122) 7. 41 (39) 8.02 (247) The numerals in parentheses indicate the number of reports on which the averages are based. (From Department of Agnculture Bulletin 285, The Northern Hardwood Forest, Table 12.) Table 7. — Comparative stumpage values per 1,000 board feet of basswood, maple, birch, and beech, 1912. [From reports of sales collected by the Forest Service.] Species. North- eastern States.i Southern States.' Lake States.' Basswood $8.40 5.98 5.61 4.38 $4.92 3.45 3.33 2.86 $6.30 Maple . . 4.58 Birch 4.85 Beech 3.67 1 Maine, New Hampshire, Vermont, Massachusetts, New York, and Pennsylvania. 2 Maryland, Virginia, West Virginia, Kentucky, Tennessee, and North Carolina. 3 Minnesota, Wisconsin, and Michigan. UTILIZATION OF BASSWOOD. 19 Table 8. — Average value ofhasswood lumber per 1,000 board feet f. o. b. mills, by States, for different years. 1899 1904 1907 1909 1911 1915 1916 1917 1918 1919 1920 United States $12.84 $16.86 $20.03 $19.50 $19.20 $18.89 $21.05 $25.96 $34.00 $40.03 |$54.28 Wisconsin 12.67 13.08 12.10 14.24 10.21 10.09 14.74 12.21 12.34 9.79 13.34 12.65 10.63 11.09 11.57 9.68 13.12 9.98 26.28 10.00 13.19 11.18 10.71 16.12 17.29 18.09 17.76 20.10 14.97 32.71 18.21 10.13 13.20 20.72 16.37 13.10 15.42 18.67 18.56 16.97 11.00 12.00 23.75 14.33 ■i6.'i2' 19.62 20.31 19.60 24.00 19.15 17.86 22.27 20.70 17.74 18.97 21.16 20.07 17.88 18.27 19.28 24.38 22.82 16.57 19.03 20.17 18.56 20.81 15.83 19.80 20.40 20.36 19.33 19.19 20.23 19.22 15.67 18.00 16.00 19.33 18.79 18.79 18.50 19.00 14.62 17.33 18.60 18.94 21.15 19.57 22.07 19.13 20.82 19. 50 22. 98 18.81 1 21.18 17.26 19.76 26.60 27.74 25.43 25.48 25.65 25.21 27.49 25.84 22.96 23.41 23.69 23.68 19.45 20.54 29.16 22.00 23.02 20.38 16.86 18.21 20.79 ia42 '26.'6i' 16.59 "36."66" 34.68 36.04 35.34 33.12 36.13 32.00 34.13 32.34 30.09 28.94 29.33 32.33 23.11 18. 82 30.19 31.30 25.53 26.49 22.46 21.22 32.50 23.33 35.00 25.06 18.48 26.44 25.00 27.67 22.00 39.78 1 57.05 Michigan 42.38 40.86 40.36 56.65 West Virginia 60.81 New York 50.44 Virginia . 37.54 64.16 Tennessee 52.87 Indiana 21.31 19.39 18.24 18.46 17.30 17.71 16.10 17.13 20.00 17.66 19.41 22.80 22.07 19.83 18.07 20.52 19.27 17.15 17.67 18.14 18.34 20.73 53.24 Ohio 49. 17 50. 14 North Carolina 44.81 18.69 18.11 20.20 21.63 17.26 17.07 17.72 : 17.10 18.36 17.02 17.09 15.96 17.47 16.20 19.37 19.53 17.61 16.71 18.24 17.88 17.10 21.94 19. 74 16. 94 14.38 16.61 12.68 15.02 18.72 19.93 42.36 53.59 Vermont 44.88 Minnesota . 38.69 New Hampshire 15.21 18.07 17.88 19.01 20. 00 20. 38 18.75 16.88 20.09 18. 36 16.37 18.00 19.60 15.00 17.30 17.87 18.18 21.37 16.61 18.75 16.00 14.00 15.50 i 20.69 18.00 26.75 16.50 16.00 23.54 22.50 18.38 19.25 13. 95 18.75 Florida 35.00 Table 9. — Average wholesale prices of basswood lumber per thousand board feet f. o. b. mill in Wisconsin and Michigan, by grades, for different years. 1909 1910 1911 1912 1913 1914 1915 1916 Wisconsin: $35.72 24.93 14.98 11.96 21.72 36.34 26.29 18.24 13.92 22.96 $34.66 23.97 14.31 $33.81 2-. 85 13.76 $34.51 23.58 16.04 $37.45 24.97 19.50 17. 30 25.05 37.78 27.11 19.69 17.57 23.03 $36.20 24.68 17.94 15.51 20.95 36.48 26.63 19.66 17.34 20.94 $33.79 22.95 15.61 13.05 19.38 35.27 25.05 18.33 14.50 20.34 $36.08 No. 1 common 4/4 25.07 No. 2 common 4/4 17.18 13.99 21.45 35.87 25.88 17.19 19.03 36.37 25.46 16.54 18.81 35. 82 24.87 16.68 Michigan: Firsts and seconds 4/4 . . 37.88 No. 1 common 4/4 27.67 18.55 15.87 22.12 20.17 20.06 21.08 20 BULLETIN 1007, U. S. 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