82
Number weight 576/18 32.00
SELENIUM (Plate X, 2) is distinguished by the exquisite peculiarity,
already noticed, of a quivering star, floating across the mouth of each
funnel, and dancing violently when a ray of light falls upon it. It is
known that the conductivity of selenium varies with the intensity of the
light falling upon it, and it may be that the star is in some way connected
with its conductivity. It will be seen that the star is a very complicated
body, and in each of its six points the two five-atomed spheres revolve
round the seven-atomed cone. The bodies in the funnels resemble those in
magnesium, but a reversed image of the top one is interposed between itself
and the small duad, and each pair has its own enclosure. The central globe
is the same as that of zinc.
SELENIUM: 4 funnels of 198 atoms 792
4 stars of 153 atoms 612
Central globe 18
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Total 1422
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Atomic weight 78.58
Number weight 1422/18 79.00
TELLURIUM (Plate X, 3), it will be seen, closely resembles cadmium, and has
three cylindrical segments--of which one is figured--making up the funnel.
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