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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 — ed to the true horizontal ( which is exactly at right anglesto a plumb line ), and so made as to turn in any direction.With this instrument we can measure angles of altitude. (21.) The transit instrument is but a telescope, firmlv fas-sit instru- ,-,,. ,. , i • i i ment# tened on a horizontal axis,… … Transit Instrument.

Astronomy

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

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