Toepler-Holtz Electrical Machine. WALWORTH MFG. CO. 20 Oliver St. Boston Mass U. S. A. LATHES GUNSMITHS TOOL MAKERS EXPERI WORK ETC. W. F. & mo. Barnes Co. 650 Elston Ave Chicag U S. A. STEAM . . PHYSICAL AND SCHOOL APPARATUS INDUCTION ROCK DRILLS AIR COMPRESSORS CRAND DRILL CO.) Philadelphia Pa. Foot power Screw. Automatic Cross feed Star Lathes ROUSE DOOR RANGERS___., scientific american, 1897-06-26

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