A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams (1829)
Curtis, Thomas, fl. 1820 · London : Thomas Tegg · leaf 556
-sections of the planes of the parallels with theplane of projection AD BE may be traced.These are necessarily parallel to 1) I*, andtheir distance from it is sin. latitude of the parallel. cos, altitude of the pole. When the latitude is south, the pole P being thenorth pole, the value of .r… … and c, which are common to that parallel, andthe circumference AI) B P^, belong to the parallelrequired; but this circle also passes through apoint, as v, determined by the preceding me-thod. We have, therefore, the three points ne-cessary for describing the arc. The inequality of the spaces as…
Encyclopedias and dictionaries · Aeronautics
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