Lockyer, Norman, Sir, 1836-1920 · London : Macmillan and Co. · leaf 260
is inconvenient to attach the telescope directlyto the polar axis, as the range is then limited : it istjxed, therefore, to a declination axis, placed above the )olar axis, and at right angles to it, as shown in the plate. 486. For the other kinds of work, telescopes, generallyof small power except… … EiGHT-TNCH Equatorial Telescope, with the Looke ;>iouNTm& Q LIGHT. 227 Lesson XXXIX,— The Solar Spectrum. TheSpectroscope. Kirchhofb-s Discovery. PhysicalConstitution of the Sun. 487. A careful examination of the solar spectrum hastold us the secret of the enormous importance of…
Astronomy · Solar system
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