A treatise on surveying, comprising the theory and the practice (1906)
Gillespie, William Mitchell, 1816-1868, Staley, Cady, 1840- · New York D. Appleton · leaf 204
Talcott method of observing a latitude consists in themeasurement of the small difference of zenith distance of two starsculminating on opposite sides of the zenith at nearly the same alti-tude and not far apart in time. This small difference is measuredwith a micrometer and is therefore very… … 104 fii:ld astronomy. 715. Adjustment of Zenith Telescope. First adjust the stridinglevel as described on page 42, then make the vertical axis perpen-dicular by means of foot screws, as shown by the bubble of thestriding level remaining in the same place while the telescope ismoved about in…
Surveying
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