The outlines of physics: an elementary text-book (1897)
Nichols, E. L. (Edward Leamington), 1854-1937 · New York, The Macmillan Company; London, Macmillan & Co., Ltd. · leaf 276
-served, although less conveniently, byviewing it in a common hand mirror,and giving the mirror a sudden turn to the right or left.It may even be observed by turning the head suddenlywhile looking at the discharge, provided the eyes beallowed to follow the motion of the head instead ofremaining… … Fig. 224. 230. Discharge in Higher Vacua. — By means of mercu-rial pumps, it is possible to carry the exhaustion of a tubeor receiver much further than in the experiments justdescribed. When a tube with two metallic terminals sealed intothe glass (Fig. ,225) is thus exhausted, we get, as…
Physics
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