Scientific American Supplement, No. 803, May 23, 1891 Summary

Everything you need to understand or teach Scientific American Supplement, No. 803, May 23, 1891.

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33,283 words, approx. 111 pages
THE GREAT EQUATORIAL OF THE PARIS OBSERVATORY. The great instrument which has just completed the installation of our national observatory is constructed upon the same principle as the elbowed equatori... Read more