Howe, Herbert A. (Herbert Alonzo), 1858-1926 · Meadville, Penna., Flood and Vincent · leaf 166
he microm- The Astronomers Workshop. 159 ticians art. But we may at least see what the greatmicrometer which is screwed on at the eye-end of theLick telescope looks like, and get a little insight into themethod of its manipulation. Looking through the eye-piece, we shall not be confronted by a… … Fig. 85.-—The Lick Micrometer. wires there must be one movable one, which is parallelto one of the fixed wires. The concealed frame, whichholds the movable wire, is driven by a fine screw, the a finelarge head of which is visible at one end of the box. Thishead is graduated so that thousandths of a…
Astronomy
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