Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 394
ad. The declination arm has also a clamp and tangent movement, as shownin the cut. The arc of the declination limb is turned on its axis and one orthe other solar lens used, as the sun is north or south of the equator ; the cutabove shows its position when it is north. The latitude is set off by… … PACV*** Fig. 3,Showing a Transit with Solar Attachment. 14 ELEMEin^S OP SURVEYING. [aPP. A. It has also a clamp-screw inserted near its centre, by which it can be setfast to the telescope axis in any desired position. The vernier of the vertical limb is made movable by the tangent-screwattached, so…
Surveying
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