the _c_ of titanium (see _k_
in the titanium diagram) and differs only in this from its group.
PALLADIUM (Plate XVIII, 3).
In palladium this septet appears as the upper sphere in every ovoid of the
upper ring.
OSMIUM (Plate XVIII, 4).
We have here no new constituents; the ovoids are set free on the proto
level and the contained globes on the meta, all being of familiar forms.
The cigars, as usual, break free on the proto level, and leave their ovoid
with only four contained spheres, which unite into two nine-atomed bodies
as in silicon (see above).
IRIDIUM (Plate XVIII, 5.)
The twenty-one-atomed cone of silver here reappears, and its proceedings
may be followed under that metal (see diagram, p. 729, May). The remaining
bodies call for no remark.
PLATINUM (Plate XVIII, 6).
Again the silver cone is with us. The remaining bodies are set free on the
proto level, and their contained spheres on the meta.
LITHIUM (Plate IV, 2, and XIX, 1).
[Illustration]
Here we have some new combinations, which recur persistently in its allies.
The bodies _a_, in Plate XIX, 1, are at the top and bottom of the ellipse;
they come to right and left of it in the proto state, and each makes a
twelve-atomed body on the meta level.
The five bodies within the ellipse, three monads and two sextets, show two
which we have had before: _d_, which behaves like the quintet and quartet
in silicon, after their junction, and _b_, which we have had in iron. The
two bodies _c_ are a variant of the square-based pyramid, one atom at the
apex, and two at each of the other angles. The globe, _e_, is a new form,
the four tetrahedra of the proto level making a single twelve-atomed one on
the meta. The body _a_ splits up into triplets on the hyper; _b_ and _d_
follow their iron and silicon models; _c_ yields four duads and a unit; _e_
breaks into four quartets.
POTASSIUM (Plate XIX, 2).
Potassium repeats the lithium spike; the central globe shows the "nitrogen
balloon," which we already know, and which is surrounded on the proto level
with six tetrahedra, which are set free on the meta and behave as in
cobalt. Hence we have nothing new.
RUBIDIUM (Plate XIX, 3).
Again the lithium spike, modified slightly by the introduction of an ovoid,
in place of the top sphere; the forms here are somewhat unusual, and the
triangles of the sextet revolve round each other on the meta level; all the
triads break up on the hyper level into duads and
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