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Showing posts with label
Science
.
Show all posts
Showing posts with label
Science
.
Show all posts
Sunday, December 30, 2012
A Great Telescope
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Mr. Alvan Clark, of Cambridge, Massachusetts, has constructed an achromatic telescope, said to be the largest in the world. The glass has...
Thursday, December 8, 2011
Water Gasses Letter from Prof. Sanders
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(From the N. Y. Scientific American, April 5.) MESSRS. EDITORS:– In your issue dated Saturday, March 29 th , you asked the question, “what ...
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