A treatise on surveying and navigation: uniting the theoretical, practical, and educational features of these subjects (1857)
Robinson, Horatio N[elson], 1806-1867. [from old catalog] · Cincinnati, J. Ernst; Toledo, Anderson, Burr, & co. · leaf 197
two meridians at the equator, is to their dis-tance in any parallel of latitude, as the radius is to the cosine of thatlatitude. 2. Any part of a parallel of latitude, is to a like part of the meri-dian, as the radius is to the secant of that parallel. We shall make an effort to illustrate these… … MERCATORS CHART 195 Let Qq be the plane of the equator, Pp the earths axis ; con-ceive a globe enclosed in the cylinder, HLNM. Suppose there is an island on the earth at a, that island is projectedon the cylinder at A. The surface of the earth at b is projected atB. Conceive this paper cylinder cut…
Surveying · Navigation
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