-tv. *•-*>.. v*it££,jX J 2 "• »V* - ■ F&*. - J .^^T 7 *55*.' -* M» «iiMliiyi rn+4 -, V Ai* ' y***. and Dealers 't$& r 0f%s*}.} .*55 ' >v« 3** ¥-' ! r SHI 1 TBAOt «**■ Ijit»eriaL G*as$ T v Wh»;:o#>■ sw alf »*'•£-■£'. . 4 '" *?v £»*i/«v ^ r.VAv?^.', ^Saw^a • y ;th» t ^r , 4^ i 5jSKs& IBiilO PyPiS-TOt a-; The A. B. C. of Prism Lighting No Mystery About the Use of Slmyrrial JHatr Prism (Blass Only a few angles are required to meet all conditions of lighting. We make them all For Sale by Jobbers throughout the Country Prity fnr prtreH and namplra Pressed Prism Plate Glass Co. Morgantown, W. Va. Chicago Sales Office, 512 Monadnock Bldg. New York Sales Office, 1170 Broadway. "SJmpmal Plat? flrtHnt (idaaa” All Angles for Vertical Installation Ground and polished one side. In cut sizes up to 54 ,, x72 n or 72"x54 n or in case lots. Morgantown, West Virginia 3 imperial pat? Prism (§>lasB (0ur Hargr piatrfl of prism glass are 54" wide and 72" high, or 72" wide and 54" high, or can be furnished as desired in single lights of smaller cut sizes. They are pressed, ground and polished on one side, and have the brilliancy and finish of polished plate glass. It is as much superior to the common, rolled sheet prism, as polished plate is to the ordinary window glass, and the street surface of our glass being polished, corresponds with other plate glass used in the building, and does not de¬ tract from its appearance, like the rolled sheets or small wired four-inch prism squares. Architects will appreciate this. Jtt ?£fitrmtrg, the large plate or light being cut to fill the entire sash of the window opening, the effect of illumination is largely increased over the old style 4x4-inch prism plates framed up with a net work of wires which obstruct the light. No l&Ufit or ICrakH. Our prism glass being in one plate, and not framed up like the small 4-inch prisms, there is no metal work to corrode or wear out, requiring costly renewal, and there can be no leaks in the corners to cause damage from dust, snow or rain. 4EhbU|J (ELctUtcfo. Our large, polished prismatic lights are easily cleaned like ordinary glass. They do not have hundreds of corners, inside and out¬ side, to catch the dust and dirt, like the small 4x4-inch prisms put together with wires or bars in the old way. Imperial Plate Prism Glass is a beautiful prod¬ uct—it is well annealed and tempered and cuts with a diamond like plate glass, and has the same strength and durability. It should be used in upper sash of windows in connection with clear glass in the lower sash, and when so installed it makes an “ideal window,” and is a most effective and economical way of ., lighting interiors at a great saving of gas or electricity. 4 Pressed Prism Plate Glass Co. Plan for “ideal Window” for Office Building. "ilmpertal Plate Prism Class’’ in upper sash and clear plate glass in lower sash. EXTERIOR SECTION All windows on both street frontages of the new 21 story Fisher Building Annex glazed in above manner. It is the best lighted office building in Chicago. Morgantown, West Virginia. 5 limn tn ©rfor Priam ®laaa W HEN ordering prism glass always state which is the width and which the height of the glass, naming the width first. If no other directions are given, a light ordered 24 x 36 is understood to be 24 inches wide and 36 inches high, and if ordered 36 x 24 is understood to be 36 inches wide and 24 inches high. This is very important in ordering prism glass. To ascertain the proper prism to use in order to get the best results in any case, simply divide the height of the opposite building (above the center of the window in which the glass is to be installed) by the width of the street, alley or court. The quotient “Q” is equal to the height ‘ of opposite building divided by the width of the street, alley or court. When quotient “Q” is from O to .46 use our D Prism 1 .46 “ .60 “ “ CC i Smooth side of glass outside .60 “ .74 “ < ( < < .74 “ .92 “ “ B J .92 “1.11 “ “ I-B “ ) I-B —inverted B 1.11 “1.26 “ “ I-C “ ( I-C — inverted C 1.26 “1.43 “ “ A “ 1.43 “1.53 “ “ B. R. “ ) 1.53 “2.90 “ “ C. R. “ f Prisms towards street 2.90 and over ‘‘ “C. C. R.“ ) 6 Pressed Prism Plate Glass Co. Example Prism Glass is to be installed in win¬ dows a, b, c, of building A, these windows being respectively 10, 20 and 30 feet above the street. The total height from the ground to the roof of the opposite building B is 60 feet and the width of the street 50 feet. The height then of the opposite build¬ ing B above the center of window (a) is 60 feet minus 10 feet or 50 feet. This divided by 50 the width of the street gives the quotient “Q” or 1.00. Morgantown, West Virginia 7 Since “Q” in this case is between .92 and 1.11 the proper prism to use for window “a” is In the same way for window (b) the height of the opposite building above the center of the window is 60 feet minus 20 feet equals 40 feet; and 40 feet divided by width of street, 50 feet, gives quotient of .80; and .80 being between .74 and .92 for window “b,” use “7?” prism. For window (c) the height of the op¬ posite building above the center of the window is 60 feet minus 30 feet, which leaves 30 feet; and 30 feet divided by the width of the street 50 feet, gives us a quotient of .60, therefore the “CC” prism should be used for window “c.” In all cases prism glass should be set as close to the outside line of building as possible. “Canopy” or “Skylight” prism glass may be used at the discretion of the archi¬ tect in places where the quotient is above 1.43. (See page 11.) 8 Pressed Prism Plate Glass Co. 18 INCHES CO 111 x o © co »g?-—? M§SS —jUMMPig 1 !!".-UWW . amw! »*aa s g ' 05 o m co Jlmpmal l^kgltgljt Prism (£lass. One-half inch backs not ground or polished. Weight about 8 pounds per square foot. Morgantown, West Virginia 9 Smpmal §lujlight Prism (glass. Made in unit plates up to 18" x 60" T?OR skylights, roofs over areaways, in light-wells, etc., in which it is desired to use prism glass, we furnish Imperial Sky¬ light Prism Plates. This product is not ground orpolished and is made with a J-inch back besides length of prisms, and thick enough to conform to the requirements of the underwriters. On account of the large size of the units (18" x 60") and the smooth shape of their borders, the number of joints and the possibility of leakage is reduced to a minimum. The use of these large sized Skylight Prism Plates also immensely re¬ duces the cost of the metal construction in which they are placed. The largest Skylight prism plate hitherto manufactured is only 13" x 13". Our unit plates can of course be cut to any smaller size. They are absolutely the best product on the market for lighting rear parts of deep stores — for roofs of railway stations , sheds , etc. They can be used horizontally, but to give the best effect should be set on an angle of 30° to 45’. If amount of order warrants expense of die the size of the units in which this glass is now made can be increased either in width or height or both. 10 Pressed Prism Plate Glass Co. I8"x60 n UNITS g>kgligl}t Prism pairs Photograph of 3lmpcrtal piatr §>kgUgl)t Priams in office of L. STRAUSS & SONS 42-46 Warren Street, New York City Morgantown, West Virginia 11 Imperial Plate (Canopy Prisma F OR canopies and awnings we make Imperial Plate Canopy Prisms. These are in 18 n x20 n units, unpolished, and with pressed borders for glazing. The action of these prisms is the same as that of the Skylight Prism Glass but the glass is made much thinner. Note —To get the best results in the use of our canopy or skylight prisms they should be set as follows: Prism “A” at 30° from the horizontal, j “ “I-A” 45° " “ ( (“A” angle inverted.) 40at &urfarr Harks We sometimes, upon request put a “mat” or satin ground surface on the back of our prism plates (instead of a polished back). This softens the sunlight and still preserves the prismatic effect of the glass. 12 Pressed Prism Plate Glass Co. Perusal of the foregoing pages will show you how simple a matter it is to select and order Prism Glass. There is no occasion to pay extraordinary prices for so-called engineering. Prism Glass is a staple pro¬ duct and should be sold as such. Any glazier can set Prism Glass in ordi¬ nary sash just as readily as he can set a piece of plate. The only thing necessary is to select the right angle from the fore¬ going table and in certain cases to make a slight increase in sash-weights. On every piece of glass shipped we place a tag stating plainly, which is the top and which the outside. Even if these tags should become detached, however, anyone can determine by referring to the preceding table just how the glass ought to be set. Morgantown, West Virginia 13 All Prism Glass, except the inverted prisms (“I-B” and “I-C”)> are set with the shorter angle to the top of the win¬ dow. Inverted prisms are set with the shorter angle to the bottom of the window. If your Prism Glass fails to give you good results, examine first if you have the proper prism, by obtaining the quotient “Q” as previously indicated, next examine whether your prisms are properly set as indicated by the preceding instructions. 14 Pressed Prism Plate Glass Co. Mljat (@ur Item (&laaa Hors I T greatly increases the amount of light over that obtained by the use of plain plate or window glass. It makes possible a reduction of a large percentage in the area of light-wells, which area can be put into valuable store space. It increases the value of rentals. It lights up dark corners. It reduces or cuts out entirely the use of artificial light in the daytime. It proves a good investment and soon “pays for itself” when properly installed. Its use is founded on scientific principles. Its value is recognized as a necessary article in building construction. With our large polished plates it is easily installed and cleaned. WRITE FOR PRICES AND SAMPLES. Morgantown, West Virginia. 15 We also manufacture a new product now being largely used imperial plate (Ornamental (ilasa for Partitions, Door Lights, Vestibule Doors and Ornamental Ceiling Lights for bank and other street windows where semi¬ obscurity is desired and for any place where clear, white light is wanted with ornamental design. This is Plate Glass with ground and polished backs and sharp clear patterns and must not be confused with cheaper grades of rolled glass. For stock patterns : Styles 0-1 (semi-obscure) 0-2 (semi-obscure) 0-3 (transparent) 0-4 (semi-obscure) 0-5 (semi-obscure) Send for samples. Special and exclusive designs made if desired. See following pages of this booklet. Pressed Prism Plate Glass Co. Morgantown, W, Va. (SEMI-OBSCURE) “ ^Imperial Plate (iruamental O&laaH ” Style 0-1. For Door Lights and Partitions, Ceilings, etc. (See Page 15) Ground and polished one side. In cut sizes up to 54" x 72 n or in case lots. (SEMI-OBSCURE) “3ftttpertal Plate (Ornamental dtlaas” Style 0 -2. For Door Lights and Partitions, Ceilings, etc. (See page 15) Ground and polished one side. In cut sizes up to 54” x 72” or in case lots. (TRANSPARENT) “Hfmpmal Plate Ornamental Olaas” Style 0-3. For Door Lights and Partitions, Ceilings, etc. (See Page 15) Ground and polished one side. In cut sizes up to 54” x 72" or in case lots (SEMI-OBSCURE) "‘Slntpertal Plate (Ornamental (Hlaas” Style 0-4. For Door Lights and Partitions, Ceiling, etc. (See Page 15) Ground and polished orfe sicfd. In c*u't sizes up to §4 W x 72" or in case Tots. (SEMI-OBSCURE) "Stetpmal fILtt? (0ntam?ntal (Ha 0 H” Style 0-5. For Door Lights and Partitions, Ceilings, etc. (See Page 15) Ground and polished one side. In cut sizes up to 54"x72 B or 72*x54 n or in case lots. JARVIS HUNT, Architect, Monadnock Building, Chicago AMERICAN TRUST BLDG. Chicago All interior, ”3lmpmal plat? <&rnam*ttlal (glass” Style 0-1. THE GEORGE A. FULLER CO., Builders, Chicago and New York 22 Pressed Prism Plate Glass Co. THE COLONY CLUB, New York City McKIM, MEAD <& WHITE, Architects Slmpmal $lat? ©rttamental (falazz Style 0-1. Used in interior abo^e building. Morgantown, West Virginia 23 McCreery CSh Company Building Wood Street 6th Avenue, Pittsburg, Pa. D. H. BURNHAM C& CO., Architects Over 2,500 square feet of our “3Jmpertal plate Priam (Mass” installed in above building, erected and Owned by the Oliver Estate, Pittsburg. Over 3,500 Sq. Ft. Glazed in this Building with our Large Polished Plates of “ifmprnal piatr prism Class’’ Also used in many other buildings in the United States and Canada. No wires. Few corners. No leaks. Easily cleaned. Any glazier can set it. HOLABIRD ROCHE, Architects. JOHN GRIFFITHS <& SONS, Builders. THE NEW BOSTON STORE BUILDING, CHICAGO, ILL Twenty-one story “FISHER BUILDING ANNEX,” Chicago All interior glass Style 0-5, “ilntpfrtal ©rttantmtal (Slaaa “3lmpmal IJlat? |Jrtam (Sdaaa” used in upper window sash of street windows and “dlmpmal Plate ©ntamental d>laaa*’ for all interior glass P. I. WEBER, Architect, Chicago THE THOMPSON-STARRETT CO., Builders, Chicago and New York 26 Pressed Prism Plate Glass Co Above cut shows installation of Style 0-5 "Jlmpmal $latr ODrnamnttal (glass” in Fisher Building, Chicago. MUNICIPAL COURTS BUILDING—CHICAGO Jenney, Mundie Jensen, Architects “The lighting is great” “ideal Windows” “Sfmprrial Plate Priam (Slaaa” used in above building. Over 1600 lights used in Ceilings, besides Door Lights, etc. of Style 0-2, "Sfmpprtal fllatp ©rttantPtttal (Slaaa FRANK LLOYD WRIGHT, Architect. Chicago PAUL F. P. MUELLER, Builder, Chicago LARKIN <& CO.’S OFFICE BUILDING, Buffalo, New York Scarritt Building, Kansas City, Mo. ROOT C& SIEMENS, Architects. Superb lighting. Ideal Windows. Door Lights and other Interior Glass of “JJmaterial |llatf GDntamrntal (Class’* Style 0-2. Large single lights "Jlmpmal fllal? JJrtBtii (glasa” used in above building. 30 Pressed Prism Plate Glass Co. THE SMITH-GRAY AND CO., BUILDING Cor. Broadway CBu Warren Sts., New York. James B. Baker, Architect. Chas. T. Wills, Builder. ICarctr lEtailjtei Imperial plate Prism (£lass used in the above building. Morgantown, West Virginia 31 National Bank of Commerce Building, Kansas City, Mo. JARVIS HUNT, Architect THE GEORGE A. FULLER CO., Builders m nrjS Jp'iisSH >r* I;******,. m m JJjJjjin m m ■ hi a t §J n S illii w 131 an Hi 111 in §g|! li 1813H1M iiiiii ift ii iinaiPiiiiii Over 20,000 square feet of Style 0-1 .Dntjjcnal |Hutr (irnanmttal dlasa used in above building for door lights, partitions, etc. 32 Pressed Prism Plate Glass Co. CHICAGO ILLINOIS ATHLETIC CLUB BUILDING BARNETT, HAYNES <& BARNETT, Architects St. I*ouis and Chicago THE THOMPSON-STARRETT CO., Builders Jmpmal piatr (Dnuunruial (Blass Style 0-5. Used in Doors, Transoms and many Windows of above Building ;> >i i :,< >V>;"- : iS®J«4'.Wk'tfcTiSkV'' jr.'^-'Sfeyv 4 !^V&-!-" '-Ws<: ’'-fc-^ M ■ #?• # ' • j ^r:«s<:-\&j^^V; ^eE3# > -jSf*VS&: ^ 4&«ae»5/. . • \i '.^^-'^SftrW.^ / •■ ■* : m-i MM szmmw* a m •>WWMM Mii I g |p j f j