Science Fair Project Encyclopedia
Alvan Clark
Alvan Clark (March 8, 1804 – August 19, 1887), born in Ashfield, Massachusetts, was an American astronomer and telescope maker. Using glass blanks made by Mantois of Paris his firm, Alvan Clark & Sons, ground lenses for refracting telescopes, including the largest refracting telescope in the world, the 40-inch at Yerkes Observatory, and the second largest, the 36-inch telescope at Lick Observatory. One of Clark's sons, Alvan Graham Clark, discovered the dim companion of Sirius. His other son was George Bassett Clark; both sons were partners in the firm.
References
- http://reference.allrefer.com/encyclopedia/C/Clark-Al.html
- Alvan Clark & Sons, Artists in Optics, by Deborah Jean Warner and Robert B. Ariail, ISBN 0943396468
10-26-2009 08:16:03
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details