Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 71
e the surfaceof the plain. This will be evident from Fig. 65, in which amountain is depicted in the middle of a plain, whose uni-form curvature is that of a sphere. From the foot of themountain the spectator will have but a very limited horizon.Let him ascend half way, his visual radius extends, is… … Fig. 6s see numerous objects where from the lower stations the skyalone was visible.
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
