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 176
nstead of four,Three leveling-screw shifting center, .... Prism attachable to eye-piece, . . . . Extra extension tripod, ...... Half-length tripod, ...... Detachable side telescope, ...... Lamp for mining engineering, of brass, with ground lens,Reflector, for illuminating cross hairs, .... Plummet… … DL S No. 22. ENGINEERS Y - LEVEL. Possesses all recent improvements. Long steel centre; star-shaped constructionof the guide for the foot - screws; clamp and tangential movement; sensitive spiritlevel. The telescope has definition, light and power in a high degree; best achro-matic Jena glass…
Surveying
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