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Scientific American, Vol. 19, No. 24 (December 1868) (1868)
leaf 3
pper stem of the Lenox top; a largeneedle or pointed wire is the best to employ, as small needlesbend and break easily.... The string in all tops should be fine, strong, and as long asthe arm of the operator can draw it. A braided or twisted silkline is the best. The plates should be strong, with… … ©1868 SCIENTIFIC AMERICAN, INC. December 9, 1868.] Sftlmtiik %mnlan. 373 the plate should be very hard to prevent the point of the heavytop from drilling a hole in it. The direction to spin the Jap-anese needle top is to hold the fly wheel and end of string be-tween the thumb and forefinger of left…Iron · Patents · Tube · Center · Consists · Wrought iron · Steel · Years ago · Tensile strength · Scientific American · Steel tube · Patent office · Square inch · Fatty acids · Cast Iron · Tea trade
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