calcium and strontium, and _d_ of calcium, the _e_ and _f_ of strontium,
are all there; _j_ in chromium is the same as the central sphere in the _b_
ovoid. In the central globe, _k_, is a pair of triangles as in hydrogen,
consisting of only six atoms, which on the meta level revolve round each
other, and break up into two duads and two units on the hyper.

MOLYBDENUM (PLATE VIII, 6).

Molybdenum presents us with only two new forms, and these are merely
four-atomed tetrahedra, occurring in pairs as object and image. All the
other bodies have already been analysed.

II a.--We come now to the second great tetrahedral group, which though very
much complicated, is yet, for the most part, a repetition of familiar
forms.

MAGNESIUM (PLATE IX, 1).

[Illustration]

We are still among tetrahedra, so have to do with four funnels, but each
funnel contains three rings, and each ring three ovoids; on the proto level
a triple dissociation takes place, for the funnels let free the rings as
large spheres, in each of which rotate three twelve-atomed ovoids, and then
the ovoids break loose from the spheres, and themselves become spherical,
so that we have finally thirty-six proto compounds from the tetrahedron. On
the meta level the contained bodies, a triplet, Mg _a_, a septet, Mg _b_,
and a duad, Mg _c_, are set free from each globe, thus yielding one hundred
and eight meta compounds. On the hyper level the triplet becomes a duad and
a unit; the duad becomes two units; and the septet a triplet and a quartet.