, 1), which, like magnesium, has no central globe, and consists simply of the zinc funnels, much less compressed than zinc but the same in composition.
SULPHUR: 4 funnels of 144 atoms 576
Atomic weight 31.82
Number weight 576/18 32.00
Selenium
(
, 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
-----
Total 1422
-----
Atomic weight 78.58
Number weight 1422/18 79.00
Tellurium
(