A treatise on surveying, comprising the theory and the practice (1906)
Gillespie, William Mitchell, 1816-1868, Staley, Cady, 1840- · New York D. Appleton · leaf 168
ll that it is difficult toget accurate measures or note the time very closely. 684. The Transit Instrument. The accompanying cuts repre-sent several of the small portable transits used by the United States TEE TRANSIT IiyfSTRUMENT. 157 Coast and Geodetic Survey. Various other forms have been… … Fig. 467 is used, but of lighter construction. Fig. 467 is a repre-sentation of the instrument formerly used for the telegraphic de-termination of longitude, a work requiring the greatest accuracyThe instrument now used for this class of work is similar in con-struction, but lighter. It has a…
Surveying
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