A treatise on surveying, comprising the theory and the practice ; (1887)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, 1840- [from old catalog] ed · New York, D. Appleton and company · leaf 346
in the center while the declination-arm is revolved horizon-tally on the polar axis. 481. To adjust the Hour-Arc. When the telescope isin theplane of the meridian, the index of the hour-circle should give ap-parent solar time—that is, mean solar time ± the equation of time.If the index does not… … 22 Transit, with Solar Attachment. 332 LAND-SUR VEYING. 482. The method of using the solar apparatus on the transit isso nearly the same as that on the compass, already given, that noseparate directions will be necessary. 483. Fig. 344 represents a transit with another form of solarattachment.* It…
Surveying
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