atomic no. 34. SELENIUM

Selenium is distinguished by the peculiarity of an exquisite 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. Fig. 61.

Central globe. The central globe is the same as that of Zinc. Znl8.

Funnels. The bodies in the funnels resemble those in Magnesium, but a reversed image of the top one is interposed between this and the small duad, and each pair has its own enclosure. There are three segments in the funnel as usual.

The Star. It will be seen that the star is a very complicated body, having six points radiating from a central sphere. In each point the spheres of five Anu revolve around the cone of seven. Each star contains 153 Anu, Sel53.

Central globe — 18 Anu

4 funnels of 198 Anu — 792 4 stars of 153 Anu — 612

Total = 1422 Anu





Globe. The central globe is a new form, though prefigured in the central globe of Zinc. It consists of nine small spheres arranged so as to form a cross, Cd48. Fig. 62.

Funnels. In Cadmium there are no spikes, but the three segments of the funnels are much more complex than in Zinc.

Each of the three segments contains four spheres Zn20 and three pillars Znl8'. The pillars are similar to those in the zinc spikes. Below each of the pillars is an ovoid with ten Anu. This is the SelO group found in the funnel of Selenium and which occurs frequently. Each segment of the funnel contains 164 Anu. hence the whole funnel contains 492 Anu.

Central globe 4 funnels of 492 Anu

48 Anu

Total = 2016 Anu



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