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Scientific American, Vol. 97, No. 22 (1907) (1907)
leaf 10
upper face of bar C a the blocks will be clamped at the ends as well as at "3+ 0+>o_______——_——_- conductor £ is imbedded. This conductor is held in the sides. A patent on this boring bar has been se- COMBINED WATER HEATER, FILTER, AND COOLER. place by means of a zinc cap electroplated on. The… … is set on a stove or range to boil the water, and thus © 1907 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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