The second pair of
spheres contains ten ovoids (7 _b_) identical with those of calcium. The
third pair contains fourteen ovoids (7 _a_) identical with those of
beryllium, while the fourth pair repeats the second, with the ovoids
re-arranged. The internal divisions of the double sphere of the central
globe are the same as in calcium, but the contents differ. The "cigars" in
the external segments are replaced by seven-atomed ovoids (7 _h_)--the
iodine ovoids--and the external segments contain five-atomed triangles (7
_i_). Thus 1,568 atoms have been packed into the beryllium type, and our
wonder is again aroused by the ingenuity with which a type is preserved
while it is adapted to new conditions.
STRONTIUM: 4 funnels of 368 atoms 1472
Central globe 96
----
Total 1568
----
Atomic weight 86.95
Number weight 1568/18 87.11
The corresponding group, headed by oxygen--oxygen, chromium, molybdenum,
wolfram and uranium--offers us another problem in its first member.
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