Evening Republican, Volume 23, Number 214, Rensselaer, Jasper County, 4 September 1920 — Immense Telescopes. [ARTICLE]

Immense Telescopes.

The largest refracting telescopes in the world are in the United States—at Yerkes observatory, Geneva Lake, Wis.. at Lick Observatory. Mt. Hamilton. Cal., at the United States observatory, Washington, D. Q, and at Harvard university. Two of the most perfect reflecting telescopes ever built are at Mt. Wilson observatory, Pasadena, Cal. The latter Is moved by electric motors tn right ascension and declination. An important feature in this instrument is the different focal lengths that can be obtained, ranging from 80,100 to 150 feet.