mply 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 (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
-----
Total 1422
-----
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.
The contained bodies in the pillars run three, four, five, four, three,
two, instead of starting with two; and a quartet replaces a duad in the
globes above. The central cross only differs from that of cadmium in having
a seven-atomed instead of a four-atomed centre. So close a similarity is
striking.

TELLURIUM: 3 segments of 181 atoms = 543
4 funnels of 543 atoms 2172
Central body 51
-----
Total 2223
-----
Atomic weight 126.64
Number weight 2223/18 123.50
* * * * *

V.

We must now consider the ways in which the members of the tetrahedral
groups break up, and as we proceed with this study we shall find how
continual are the repetitions, and how Nature, with a limited number of
fundamental methods, creates by varied combinations her inf