Mechanical movements, powers, devices and appliances; (1903)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The N.W. Henley & co. · leaf 306
TT940-. rxivERSAL srx DIAL.—The face of the dialto be placed parallel with theequator, as shown by the indexof the latitude. - The range ofthe stile and the 12-hour mark-to be on the meridian. The inner hour circle figur-ing is reversed so that by in-verting the dial the summermorning and evening… … 1195. DIAMOND PROSPECTINGDRILL, operated by hand. The drill rod ishollow, with a hose connection at the top,through which water is forced to the bottomand up outside of the drill to wash out the bor-ings. The drill point is set with bort or blackdiamonds, and is revolved quickly by the cranksand…
Mechanical movements
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