Manual of modern surveying instruments and their uses .. (1893)
Lietz, firm, math. instr. makers, San Francisco. (1893. The A. Lietz company) [from old catalog] · [San Francisco] The Company · leaf 37
rd of a revolution to the rightwill make the connection; at the same instant the spring C willfall into a hole on the tripod head, which thus prevents anypossible disconnection; the latter is effected by lifting the springC and turning to the left. If the tripod head should have beenworn or bent by… … The chief merit of our arrangement is that it enables oneto attach or detach the instrument to or from its tripod more THE A. LIETZ COMPANY. 13 rapidly, firmly and safely than by any other device so far known,and that, too, without dividing the instrument proper into twoparts, which is always…
Surveying
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