Elements of astronomy: accompanied with numerous illustrations, a colored representation of the solar, stellar, and nebular spectra, and celestial charts of the northern and the southern hemisphere (1875)
Lockyer, Norman, Sir, 1836-1920 · New York, D. Appleton and company · leaf 90
returned to the place from which they set out. 161. The Sensible Horizon.—On all sides of us we seea circle of land, or sea, or both, on which the sky seems torest; this is called the Sensible Horizon. If we observe itfrom a little boat on the sea, or from a plain, this circle issmall; but if we… … Fig. 34.—Hokizoxs of the Same Place, at Diffekent Heights. the only figure which, looked at from any external point,is bounded by a circle; and as the horizons of all placesare circular, the Earth is a sphere, or nearly so. 161. What is the Sensible Horizon ? What proof of the Earths roundness does…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
