Howe, Herbert A. (Herbert Alonzo), 1858-1926 · Meadville, Penna., Flood and Vincent · leaf 157
n thecircle. If the tele-scope, wnicn is now pointing upward, were turned soas to point downward, the graduated circle would turnwith it, and the angle through which the telescope wasturned could be measured by means of a suitable fixedpointer placed close to the silver graduations. If thepointer… … b\o. 79.—A Meridian Circle. which is now pointing upward, The Astro7io7?ter>s Workshop. 151 straight down, the circle having been turned just halfway round. Instead of one pointer there are usuallyfour ; the silver graduations are so fine that they cannotbe well seen without a magnifying glass ;…
Astronomy
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