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 200
No. 42f. REFLECTING CIRCLE, Mounted on a Brass Stand. Has two prisms. Circle, io# inches diameter, with two verniers reading 10 seconds.Measures angles from o to 36.0°, which is made possible by the peculiar shape of theprisms. Provided with three pairs of colored shades. Telescope has an aperture… … No. 43f. REFLECTING CIRCLE, For Nautical Purposes. Diameter, 10 inches. Complete with telescope, having two astronomical eye-pieces.Verniers reading to 10 seconds. Measures angles from o to 2880. Prismatic eye-piece.Three pairs of colored shades. Complete with brass stand and lamp for night…
Surveying
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