On a Method for Deducing Approximately the Focal Lengths and Magnifying Powers of Early Telescopes. An offprint from the Monthly Notices of the Royal Astronomical Society. Volume 85, No. 7.

S.B. Gaythorpe

Published by Royal Astronomical Society, 1925
Condition: Used - Very good

Sold by Cosmo Books, Shropshire., United Kingdom

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Used

Condition: Used - Very good

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