Herschel, John F. W. (John Frederick William), Sir, 1792-1871 · London : Longman, Rees Orme · leaf 158
n only the central por-tions are represented of their true forms, while all theexterior is more and more distorted and crowded toge-ther as we approach the edges of the map. Owing tothis cause, the orthographic projection, though verygood for small portions of the globe, is of little servicefor… … 152 A TREATISE ON ASTRONOMY. CHAP. 111. sure free from this defect. To understand this pro-jection, we must conceive an eye to be placed at E, oneextremity of a diameter, ECB, of the sphere, and toview the concave surface of the sphere, every point ofwhich, as P, is referred to the diametral plane…
Astronomy
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