* * * * *
VI.
III AND IIIa.--THE CUBE GROUPS.
We have here four groups to consider, all the members of which are triads,
and have six funnels, opening on the six faces of a cube.
III.--Boron, scandium and yttrium were examined; they are all triatomic,
paramagnetic, and positive. The corresponding group consists of nitrogen,
vanadium and niobium; they are triatomic, paramagnetic, and negative. We
have not examined the remaining members of these groups. In these two
groups nitrogen dominates, and in order to make the comparison easy the
nitrogen elements are figured on both Plate XI and Plate XII. It will be
seen that scandium and yttrium, of the positive group, differ only in
details from vanadium and niobium, of the negative group; the ground-plan
on which they are built is the same. We noted a similar close resemblance
between the positive strontium and the negative molybdenum.
[Illustration: PLATE XI.]
BORON (Plate III, 4, and Plate XI, 1). We have here the simplest form of
the cube; the funnels contain only five bodies--four six-atomed ovoids and
one six-atomed "cigar." The central globe has but four five-atomed spheres.
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