Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 494
m our system are increasing or diminishing. On closelyexamining the hydrogen lines of Sirius, and comparing them with the brightlines of hydrogen rendered incandescent by electric discharges in a Geisslertube, the spectrum of which his instrument enabled him to place side byside with that of the… … Fig. 230.—iiolar Prominences, No. i. a longer Avave-length, or increased period of vibration, according to thetheory of light, which would be accounted for by a receding motion betweenSirius and the earth, jui.t as the crest of successive waves of the sea wouldovertake a boat going in the same…
Inventions
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