Democratic Sentinel, Volume 15, Number 36, Rensselaer, Jasper County, 25 September 1891 — A NEW SKY SEARCHER. [ARTICLE+ILLUSTRATION]

A NEW SKY SEARCHER.

Carle ton College Own* One of the Finest Telescopes In the Land. Carleton College, at North field, Minn., is to be congratulated upon possessing in its new telescope the most accurate of its size in the United States. It is so styled by experts,

and it places Goodsell Observatory amohg the best-equipped observatories in the country. In size the telescope ranks sixth and . in power fifth in the country. The clear aperture of its object glass is 16.2 inches, its focal length is 22 feet, and its working powers range between 136 and 1,600 diameters. Under a power of 1,600 it gives beautiful images and easily reaches and separates surprisingly close double stars.

The computations for the objective were made on a new plan by Dr. S. C. Hastings, of Yale, and crown glass from Paris, and flint glass from Germany, were used. The telescope is modelled after the great Lick telescope, but has several improvements. The driving clock is provided with an electrical attachment to control the movement at the will of the observer. The right ascension clock, electric lamps, glasses and other conveniences for setting the telescope are all that could be desired, and the arrangements for slow motion are the best yet devised. The total weight of the instrument, including the pedestal, is 12,700 pounds. The new universal spectroscope, devised by Mr. Brashear, is arranged to be attached to the telescope for the study of the physical characteristics of the celestial bodies, or equally well for use in the physical laboratory. It is provided with an electric lamp attachment for comparison, spectral and measurements, photographic apparatus, prism and grating.

NEW EQUATORIAL AT CARLETON COLLEGE.