Page:Popular Science Monthly Volume 11.djvu/371

Rh In this diagram, the sun's rays being S', S", etc., BO, FO, etc. will be the reflected rays; and the several angles between these lines of incidence and reflection, together with the number of rays reflected




 * [The relative proportions of the earth and the ring, and also its distance, are of course not given in this diagram with any effort at certainty; the upward extent of the ring is probably far greater than can be here represented. The diagram is, however, sufficiently correct for our present purposes of elucidation.]

to the eye, out of every 1,000 incident rays, according to Bouguer, are in the following table: