Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 427
in-stead of being spread broadcast from the red to the violet,will simply fall here and there on the spectrum ; in thecase of one vapour we may get a yellow line—a yellowimage of the slit—and in the case of another vapour,we may get a green one; the light selects its point ofappearance, and does… … Fig. 179.—Electric Lamp, y, z, wires connecting battery of 50 Grove or Eunseuelements ; G, H, carbon holders ; K, rod, wliich stops a clockwork move-ment, whicli when going makes the poles approach until the current passes ;A, armature of a magnet which by means of k frees the clockwork when notin…
Astronomy · Telescopes
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