A treatise on levelling, topography, and higher surveying (1876)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, b. 1840, ed · New York, D. Appleton and company · leaf 128
t upon sockets which are fastened tothe wall or roof of the mine. (176.) The Mining Transit. In this the telescope is on oneside, as shown in Fig. 141, and is balanced by a weight on theopposite side. The advantage of . . . Fig. 141. this form is, that sights may betaken vertically up or down, as… … HO LEVELLING, TOPOGRAPHY, AND HIGHER SURVEYING. When different levels are to be represented, with theirconnecting shafts, etc., isometrical projection has beenused, but military or cavalier projection is best. CHAPTER II. LOCATING NEW LINES. (178.) Second Object. To determine, on the surface of…
Surveying
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