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A treatise on astronomy, descriptive, physical and practical. Designed for schools, colleges, and private students (1849)

Robinson, Horatio N. (Horatio Nelson), 1806-1867 · Albany, N.Y., E.H. Pease & Co.; [etc., etc.] · leaf 30

An illustration from A treatise on astronomy, descriptive, physical and practical. Designed for schools, colleges, and private students, 1849, leaf 30 — Transit Instrument. … Meridian Wires. To place the instrument in this posi-tion, is a very difficult matter; but it isa difficulty which, at present, should notcome under consideration; we simplyconceive it so placed, ready for observa-tions. In the focus of the eyepiece, and atright angles to the length of the…

Astronomy

Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.

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