Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 317
it is expensive, and because, again, tillwithin the last few years our opticians were not able tograpple with all its difficulties. Hence it is that some of the instruments which have 294 STARGAZING : PART AND PRESENT. 1300K V. been most uobly occupied in investigations in physicalastronomy have… … Fig. 134.—The 40-feet at Slongh. Lord Rosses six-feet reflector again is mounted in adifferent manner. It is not equatorially mounted; thetube, supported at the bottom on a pivot, is moved bymanual power as desired between two high side walls,carrying the staging for observers, and so allowing the…
Astronomy · Telescopes
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