The central globe is double, globe within globe, and is
divided into eight segments, radiating from the centre like an orange; the
internal part of the segment belonging to the inner globe has a triangular
body within it, containing four atoms (7 _c_), and the external part,
belonging to the encircling globe, shows the familiar "cigar" (7 _d_). In
this way 720 atoms are packed into the simple beryllium type.
CALCIUM: 4 funnels of 160 atoms 640
Central globe 80
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Total 720
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Atomic weight 39.74
Number weight 720/18 40.00
STRONTIUM (Plate VIII, 3) shows a still further complication within the
funnels, no less than eight spheres being found within each. Each of the
highest pair contains four subsidiary spheres, with five, seven, seven,
five atoms, respectively (7 _e_, _g_, _f_). The _g_ groups are identical
with those in gold, but difference of pressure makes the containing body
spherical instead of ovoid; similar groups are seen in the top ring of the
iodine funnel, where also the "hole" is ovoid in form.
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