Atkinson, Philip. [from old catalog] · New York, The Century co. · leaf 274
ecially diamonds, from their cheap imitations; thediamond being nearly transparent to the rays, while itsimitation in glass is nearly opaque. This is well illustrated by Fig. 115, which represents asciagraph taken with a small tube by an exposure offifteen minutes. Real diamonds of various kinds… … Fig. 115. 252 ELECTRICITY FOE EVERYBODY. lusterless substance, perfectly opaque to rays of light, isas transparent to the X-rays as the brilliants, while thediamond bortz, number 6, which is an imperfect brilliant,is much less transparent than either, but more so thanthe imitation, number 19. The…
Electricity
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