the funnel; on examination each of
these is seen to consist of three, with other bodies, spheres, again within
them. Apart from this, the composition is simple enough, all the ovoids
being alike, and composed of a triplet, a septet and a duad.

MAGNESIUM: 4 funnels of 108 atoms 432
Atomic weight 24.18
Number weight 432/18 24.00
ZINC (Plate IX, 2) also brings a new device: the funnel is of the same type
as that of magnesium, while septets are substituted for the triplets, and
36 additional atoms are thus slipped in. Then we see four spikes,
alternating with the funnels and pointing to the angles, each adding 144
atoms to the total. The spikes show the ten-atomed triangle, already met
with in other metals, three very regular pillars, each with six spheres,
containing two, three, four, four, three, two atoms, respectively. The
supporting spheres are on the model of the central globe, but contain more
atoms. Funnels and spikes alike radiate from a simple central globe, in
which five contained spheres are arranged crosswise, preparing for the
fully developed cross of cadmium. The ends of the cross touch the bottoms
of the funnels.

ZINC: 4 funnels of 144 atoms 576
4 spikes of 144 atoms 576
Central globe 18
-----
Total 1170
-----
Atomic weight 64.91
Number weight 1170/18 65.00
CADMIUM (Plate IX, 3) has an increased complexity of funnels; the diagram
shows one of the three similar segments which lie within the funnels as
cylinders; each of these contains four spheres, three pillars and three
ovoids, like the spike of zinc turned upside down, and the zinc ten-atomed
triangle changed into three ten-atomed ovoids. The centre-piece is a new
form, though prefigured in the central globe of zinc.

CADMIUM: 3 segments of 164 atoms = 492
4 funnels of 492 atoms 1968
Central body 48
-----
Total 2016
-----
Atomic weight 111.60
Number weight 2016/18 112.00
The corresponding negative group is headed by

[Illustration: PLATE X.]

SULPHUR (Plate X, 1), which, like magnesium, has no central globe, and
consists si