It is difficult to recognize the familiar dumb-bell in this elongated egg,
but when we come to examine it, the characteristic groupings appear. The
egg is the enormously swollen connecting rod, and the upper and lower parts
with their central globes are the almond-like projections above and below,
with the central ovoid. Round each almond is a shadowy funnel (not drawn in
the diagram), and within the almond is the collection of bodies shown in
_e_, wherein the two lowest bodies are the same as in every other member of
the negative and positive groups; the third, ascending, is a very slight
modification of the other thirds; the fourth is a union and re-arrangement
of the fourth and fifth; the fifth, of four ovoids, adds one to the three
ovoids of bromine, iodine and silver; the triangular group is like that in
copper and silver, though with 28 atoms instead of 10 or 21, and it may be
noted that the cone in iron has also 28. The central body in the ovoid is
very complicated, and is shown in _c_, the bodies on each side, _d_, are
each made up of two tetrahedra, one with four six-atomed prisms at its
angles, and the other with four spheres, a pair with four atoms and a pair
with three.
Pages:
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74