By Starlight and Moonlight With the Warner Swasey Prism Terrestrial Telescope: Some Easy Astronomical Observations (Classic Reprint) - Hardcover

Company, Warner And Swasey

9780266994404: By Starlight and Moonlight With the Warner Swasey Prism Terrestrial Telescope: Some Easy Astronomical Observations (Classic Reprint)

Hardcover

ISBN 10: 0266994407 ISBN 13: 9780266994404

Publisher: Forgotten Books, 2017

Excerpt from By Starlight and Moonlight With the Warner Swasey Prism Terrestrial Telescope: Some Easy Astronomical Observations

The objective is 2 inches in diameter, clear aperture. Two eye-pieces are provided, magnifying respectively 25 and 50 diam eters. The telescope tube and the alt-azimuth mounting are made of aluminum. The folding tripod is of carefully selected ash. All are contained in a neat leather-covered carrying case; total weight only twelve pounds. Weight of telescope with its tripod and mounting, apart from case, but six and a half pounds.

The high quality of its optical equipment, and the simplicity and adequacy of its mechanical provisions, make it superior to any similar telescope upon the market for the camper, the traveler, the motor-tourist, the surveyor, or the marksman upon the rifle-range. It is especially adapted for porch, seaside and general use.

While thus designed strictly as a terrestrial telescope, its purchasers have also found it of much interest and value in the field of amateur astronomy. It is not presented as - in the tech nical sense - an astronomical telescope; and yet its quality is so superior that its efficiency is actually greater than that of many larger astronomical telescopes heretofore offered to the public. The ease with which it can be moved from place to place in the observation of moon and stars, its sharp definition and breadth of field, combined with the precision and steadiness with which the instrument may be pointed and controlled, have brought many expressions of satisfaction from those who having first purchased it as a terrestrial telescope have subsequently tested it in their observations of celestial objects. To respond to the interest and the demand thus indicated, and to illustrate, for beginners, some of the simple astronomical uses of the Warner Swasey Prism Terrestrial, this little booklet has been prepared.

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