EwAll GoncreleHoors gspjjP BEVO BUILDING St. Louis. Mo. archs. WIDMAN a WALSH, KLIPSTEIN a RATHMAN CONTRS. GILSON1TE CONST. CO. FLOOR SPACE OVER t.000,000 SO. FT. ALL TREATED WITH LAP1DOLITH IA-PID O | IT H TRADE MARK Concrete Jloors in these plants ivere wear- proofed and dustproofed with Lapidolith FORD MOTOR CO. . . Detroit. Mich ARCH. ALBERT KAHN CONTRS SELDEN-BRECK CONST. CO. PACKARD MOTOR CAR CO. . . DETROIT. MlCH. ARCH. ALBERT KAHN CONTRS. BRYANT & DETWEILER WILLIAM SKINNER MFG. CO. . . Holyoke. Mass. CONTRS. CASPER RANGER CONSTRUCTION CO. For Dustproofing and Wearproofing Concrete Floors Lapidolith, the liquid chemical hardener for concrete floors, has been weighed and found not wanting in any point of service. Used for years by leading concerns, it has registered “Success” on the scales of public opinion. Easily applied to new or old concrete floors, it renders them dustproof, wearproof and waterproof. Results are guaranteed. Write for all of the evidence, both practical and scientific. L. SONNEBORN SONS, Inc., 262 Pearl Street, New York THREE-IN-ONE OIL CO. . . Rahway. N. J ARCHS. a ENGRS. H. D. BEST a CO SPERRY FLOUR MILLS . . . San Francisco. Cal. ARCH, a ENGR. MAURICE C. COUCHOT CONTRS. DINWIDDIE CONST. CO. ozt,! £77 S*)£l-LV F>ISS J 0'p Concrete floors in these plants were wear- proofed and dustproofed with Lapidolith IAPIDOIITH m—mmmmm TRAOC HARK hmm Ibr every Concrete Flo or PITTSBURG PLATE GLASS CO. Pittsburg. Pa. ARCHS. HUNTING-DAVIS CO. CONTRS. GEO. HOGG CO. You Can Apply It Unskilled labor working under ordi¬ nary supervision can successfully apply Lapidolith. For example, at the modern Armstrong Cork Co. factory, Lapidolith was applied without our assistance, and the result was such that the floors in their other plants have since been likewise treated. B. F. GOODRICH CO. . . Akron. Ohio ENGRS. STONE & WEBSTER. OSBORN ENGINEERING CO. CONTRS. CARMICHAEL CONST. CO.. H U N K IN-CO N K E Y CONST. CO. Or We Will Apply It If you so desire, we will take all the responsibility of applying Lapidolith, as in the case of the Chalmers Knit¬ ting Co. We will send an expert to your plant and he will turn your floors over to you as hard as granite. We have saved a great many factory floors in this way. ROYAL INSURANCE CO San Francisco Cal. ARCHS HOWELL & STOKES CONTRS. THOMPSON-STARRETT CO. IA-PIPOIITH TRADE MARK MMM K>r evei^y Concrete Flo or TIN DECORATING CO. . BALTIMORE. Md ARCH. THEODORE WELLS PIETCH CONTRS IRWIN & LEIGHTON B a O. WAREHOUSE PITTSBURG. Pa ARCH. M A. LONG. ASST. CHIEF ENGR.. B. & O. R R. CHALMERS KNITTING CO . . AMSTERDAM. N. Y. ARCHS. C. R. MAKEPEACE a CO. CONTRS. TURNER CONSTR. CO. AMERICAN EVEREADY WORKS . . . OAKLAND. CAL. (NATIONAL CARBON CO.) ARCH, a ENGR MAURICE C. COUCHOT ERECTED BY NATIONAL CARBON CO CRANE CO ARCHS. H. D BURNHAM a CO CONTRS. LANQUI: The Factory Owner Walking and trucking grinds up the sharp silicate con¬ crete dust from untreated floors. If you do not know this, ask your sweepers. This dust is the danger signal. Disintegration is taking place. It also means that this dust is getting into deli¬ cate machinery or perhaps into merchandise, and so it is running up a bill of expense for you. Have Lapidolith flushed on your floors —old or new — and harden them chemically. We guarantee positive, permanent results. Then there will he no need of patch¬ ing, which is always unsatisfactory, or re-topping, which is extremely expensive. We will send you testimonials from every state, every city and every line of business. Lapidolith has been used for years. It is a money-saving success. Untreated concrete floors are bound to dust and break up. Lapidolized floors are as hard as granite, as you can prove for yourself by scratching with a nail or sharp instrument the concrete block which we will fur¬ nish you, half treated, half untreated. Write for full particulars, scientific proof, testimonials, sample concrete block and sample of Lapidolith for test on your own floors. CHEVROLET MOTO ENGRS. a CONT Concrete Jloors in these plants were wear- proofed and dustproofed with Lapidolith hicago. Ill .LSELY CO.. BLOME SINEK CO.. THOM PSON-STARRETT CO Architect and Engineer A large and growing number of architects and engineers know about Lapidolith by experience. They are speci¬ fying it because they know it will absolutely dustproof and wearproof concrete floors by chemical action. Architects and engineers who are confronted with com¬ plaints regarding unsatisfactory concrete floors will gladly turn to Lapidolith as the way out of an embarrassing situation. You cannot control workmen's mistakes or weather con¬ ditions which affect concrete floors in their plastic form. But if mistakes occur, Lapidolith will save the day by saving the concrete floors from further disintegration. You should specify that Lapidolith be used after new floors are set and dried. Then they are insured against dust and wear. Remember, Lapidolith is successfully used in hardening millions of square feet of concrete floors which were considered satisfactory by architect and owner at the time of construction—before Lapidolith came into general use. Specification booklets and full information on request. L. SONNEBORN SONS, Inc. 262 Pearl Street New York NORWICH WOOLEN MILLS . . . Norwich. Conn. ARCHS. C. R. MAKEPEACE & CO. CONTRS. TURNER CONST. CO. A. G. SPALDING & BROS. . . CHICOPEE. MASS. NEW DEPARTURE MFG. CO. . . BRISTOL. Conn ARCHS. LOCKWOOD. GREENE ft CO. CONTRS. TURNER CONSTR. CO. R CO . . Flint. Mich n . e. wood & co. ROCKWOOD & CO. . . Brooklyn. N. Y ARCHS LOCKWOOD. GREENE & CO. CONTRS. TURNER CONSTR. CO. IAPJ.R9UJH Eir every Concreie Flo or Concrete floors in these plants were wear- proofed and dustproofed with Lapidolith LOS ANGELES HIGH SCHOOL . . . Los ANGELES. Cal. ARCH. J. C. AUSTIN CONTRS. BARBER BRADLEY CONSTR. CO. Concrete Dust Must Be Eliminated from schools,colleges and all institutions where sanitary conditions are paramount. But concrete dust is normally ground up from concrete floors by the actual constant walking on concrete floors. The liquid chemical concrete hardener Lapidolith will stop both concrete dust and wear. It improves sanitary conditions and makes it easier for the janitor to keep the floors clean, because lapidol- ized floors are non-absorbent—practically waterproof, so they can he easily washed and quickly dried. PURDUE UNIVERSITY . . . Lafayette. Ind ARCHS. R. P. DAGGETT a CO. t . ' CONTR. LESLIE COLVIN ST. JOSEPH'S HOSPITAL . . . Kansas City, Mo. ARCHS. WIGHT a WIGHT CONTRS GEO. A FULLER CO. ■f)'. J ►I' A Concrete floors in these plants were wear- proofed and dustproofed with Lapidolith IAPIPOIITH w—mmmm trade hark For every Concrete Flo or DURHAM COUNTY COURT HOUSE . . . Durham. N. C ARCHS. MILBURN, HEISTER CO. CONTRS. GEO. A. FULLER CO. MUNICIPAL BUILDING . . . Hartford. Conn. ARCHS. DAVIS & BROOKS CONTRS. NORCROSS BROS., P. J. CARLIN CONST. CO. A Few of the Thousands of Users of Lapidolith American Woolen Co.Boston, Mass. American Writing Paper Co.Holyoke, Mass. Armstrong Cork Co. (and 4 other plants) . Camden, N. J. Continental Can Co.Chicago, Ill. Crane Company (and 4 other plants) . . . Oakland, Cal. Ford Motor Co. (and 20 other plants) . . . Detroit, Mich. General Electric Co. (and 4 other plants) . Schenectady, N. Y. B. F. Goodrich Co.Akron, Ohio Johns Hopkins University.Baltimore, Md. Pennsylvania Railroad Standard Oil Co.Drumright, Okla. U. S. Steel Corporation U. S. Navy Aetna Life Insurance Co.Hartford, Conn. Aluminum Company of America.Maryville, Tenn. Atlantic Sugar Refineries, Ltd.St. John, N. B. Canadian Fairbanks-Morse Co.Montreal, Quo. Carborundum Co.Niagara Falls, N. Y. Chalmers Knitting Co.Amsterdam, N. Y. Chevrolet Motor Car Co.Oakland, Calif. Crucible Steel Co. of America.Syracuse, N. Y. General Chemical Co.Bayonne, N. J. Goodyear’s India Rubber Glove Mfg. Co. . Naugatuck, Conn. Gulf States Steel Co.Alabama City, Ala. National Can Co.Detroit, Mich. National Lamp Works (and 2 other plants) Cleveland. Ohio New England Westinghouse Co.Springfield, Mass. Nordyke & Mannon Co.Indianapolis, Ind. Rubberset Co.Newark, N. J. Washburn Crosby Co.Minneapolis, Minn. Whiting Paper Co.Holyoke, Mass. Wm. Wrigley, Jr., Co. (and 2 other plants) . Brooklyn, N. Y. Wright-Martin Aircraft Co.. New Brunswick, N. J. Allegheny Steel Co. . . Pittsburg, Pa. Bemis Bros. Bag Co.Seattle, Wash. Bethlehem Steel Co.. Lebanon, Pa. Daggett & Ramsdell.New York, N. Y. Fownes Bros. & Co.New York, N. Y. Hamilton Watch Co. . ... Lancaster, Pa. Pierce Arrow Motor Car Co. .Buffalo, N. Y. A. G. Spalding & Bros. Mfg. Co.Chicopee, Mass. Three-In-One Oil Co..New Y r ork, N. Y. SOUTHERN HOTEL . . . BALTIMORE. MD. ARCH. OTTO G. SIMONSON CONTRS. LONGACRE CONST. CO. Lapidolith Used in Every Continent Australia, Sydney Elliott, MacLean & Co. China, Amoy Hope Hospital Cuba, Havana Cuban-American Sugar Co. England, Manchester W. MacDonald & Co. India, Bombay West Indian Import Co. Ireland, Belfast Sirocco Engineering Works Java, Soerabaia Yoorheen E. Wichers Mexico, Yucatan La lndustria Co. Norway, Christiania Sigurd Hesselberg Porto Rico, San Juan Porto Rico-American Siam, Bangkok 1 obacco Co. General Electric Co. South Africa, Port Elizabeth Cape Trading Co. Sweden, Stockholm Martin Hellner ||||! K t nit i«1111111 filiil ii ii ;■ ->7 G ii J T| jjssjj G 33 33 311-, 33 33 33 31 ii 33 33 33 33 33 33 33 33 33 33 33 33 33 11 33 II 33 33 31 33 II II 11 II II II II 13 II K TMii" 111 ■giif lilli ” i- mninti mini" 1 id! LEXINGTON STREET BUILDING Baltimore. Md. ARCHS. PARKE. THOMAS fit RICE CONTR. J. HENRY MILLER. INC. DODGE BROTHERS MOTOR CAR COMPANY Detroit, Mich. ARCHS. & ENGRS. SMITH. HINCHMAN & GRYLLS CONTRS. WHITE CO. Klgfcjgi Sgaaf mmmm Sts X C>0 ft How To Buy Lapidolith Return the enclosed postal card today. Or write stating the approximate area ot‘ concrete floors you desire to dustproof and wearproof. We will tell you how much material you need, and what it will cost. If you have a large area we will send an expert to inspect it and estimate the cost of treating the floors under our own supervision. m $ “SS I