number of the inquiry. FOR FINE ACCURATE WORK Engine and Foot Lathes MACHINE SHOP OUTFITS TOOLS AND SUPPLIES. BEST MATERIALS. BEST WORKMANSHIP. CATALOGUE FREE SEBASTIAN LATHE CO. 120 Culvert St. Cincinnati. 0. instructive Scientific Papers ON TIMELY TOPICS THE SHRINKAGE AND CONSTRUCTION OF AN INDICAT DIRECT-VISION SPECTROSCOPES. DYNAMO AND MOTOR COMBINED. Price 10 Cents each by mail Counters Booklet Free FEEDER MFG. CO. 18 Sargeant St. 'MAJESCO PHOTO' CHEMICAL ART CO. FOR GUNSMITHS TOOL MAKERS EXPERI MENTAL & REPAIR WORK ETC. W. F. & O. BARNES CO. Automatic Water Supply B. F. BARN ES-
number of the inquiry. FOR FINE ACCURATE WORK Engine and Foot Lathes MACHINE SHOP OUTFITS TOOLS AND SUPPLIES. BEST MATERIALS. BEST WORKMANSHIP. CATALOGUE FREE SEBASTIAN LATHE CO. 120 Culvert St. Cincinnati. 0. instructive Scientific Papers ON TIMELY TOPICS THE SHRINKAGE AND CONSTRUCTION OF AN INDICAT DIRECT-VISION SPECTROSCOPES. DYNAMO AND MOTOR COMBINED. Price 10 Cents each by mail Counters Booklet Free FEEDER MFG. CO. 18 Sargeant St. 'MAJESCO PHOTO' CHEMICAL ART CO. FOR GUNSMITHS TOOL MAKERS EXPERI MENTAL & REPAIR WORK ETC. W. F. & O. BARNES CO. Automatic Water Supply B. F. BARN ES-r ELEVEN-INCH SCREW CUTTINC LATHE B. F. BARNES CO. Rockford Ill. Pipe Cutting and Threading Machine THE CURTIS & CURTIS CO. New York 847044 INDEX OF INVENTIONS For which Letters Patent of the United States were issued for the Week Ending March 12 1907. AND EACH BEARING THAT DATE, scientific american, 1907-03-23
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