A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 55
or measuringangles; mere time-observationswill not suffice. The instrumentmost used for this purpose is theMeridian Circle, or Transit Cir-cle, which is simply a transit in-strument, with a graduated circleattached to its axis, and revolv-ing with the telescope. Some-times there are two circles,… … Fig. 19. — The Meridian Circle (Schematic). ASTRONOMICAL INSTRUMENTS. 43
Astronomy
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