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 188
rresponds to lat. 41° 9, then thedifference of longitude by the preceding rule must be 5° 10, and ifthe departure corresponds to lat. 44° 41, then the difference of lon-gitude is 5° 28; the mean of these is 5° 19, and if we take the de-parture to correspond with the mean latitude 42° 55, then the… … PLANE SAILING. 185 Meridians are not parallel with each other, and therefore when aship sails by the compass, and cuts all the meridians at the sameangle, the line that the ship sails will not be a right line : it will bea curve line peculiar to itself, called a rhumb line. For the sake of…
Surveying · Navigation
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![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-77-8.webp)
