Light visible and invisible : a series of lectures delivered at the Royal Institution of Great Britain, at Christmas, 1896 (1897)
Thompson, Silvanus Phillips, 1851-1916, Royal Institution of Great Britain · New York : Macmillan · leaf 188
olet kind. A thin glass bulb containing the mixed gases is nowtaken by my assistantfrom a tin box, whereit has been kept in thedark. To prevent acci-dents he places it in anempty lantern (Fig. 101),into the nozzle of whichwe will direct, from out-side, the beams of anelectric arc-lamp. Tocut off… … Fig. ioi. 168 LIGHT lect. —it explodes, demonstrating the activity of waves of thissort. Perhaps it may have struck some of you that if sogreat a photographic activity is possessed by waves thatare invisible to our eyes, it ought to be within the limitsof possibility to photograph things that are…
Light · X-rays
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