Lessons in astronomy including uranography. A brief intoductory course without mathematics (1896)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston, London, Ginn and company · leaf 328
Fig. i - The Transit Instrument. … 417. The Astronomical Clock, Chronometer, and Chrono-graph. — A good timepiece is an essential adjunct of the tran-sit instrument, and equally so of most other astronomicalinstruments. The invention of the pendulum clock by Huy- 316 APPENDIX. [§ 417 ghens was almost as important an event in the…
Astronomy
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