Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 271
shows the CambridgeTransit Circle, indicates the arrangement of the fivemicroscopes in use there, set round the circumference ofthe circle, much in the same manner as in the case of theGreenwich instrument, where there are holes through the 248 STARGAZING : PAST AND PRESENT. [book IV. pier in which… … Fig. 120.—Cambridge (U.S.) meridian circle. rio-ht ascension of the star, in a careful and elaborate way,but the readings of the circle are made by every one ofthese microscopes—reading from the next five minutesdivision of the circle which happens to be visible,—and there is an additional…
Astronomy · Telescopes
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