Total 864
----
Atomic weight 47.74
Number weight 864/18 48.00
ZIRCONIUM (Plate XV, 3) has exactly the same outline as titanium, the
carbon atom is similarly distributed, and the central body is identical.
Only in 5 _c_ and _d_ do we find a difference on comparing them with 4 _c_
and d. The _c_ ovoid in zirconium shows no less than fifteen secondary
globes within the five contained in the ovoid, and these, in turn, contain
altogether sixty-nine smaller spheres, with two hundred and twelve atoms
within them, arranged in pairs, triplets, quartets, quintets, a sextet and
septets. Finally, the ovoids of the ring are also made more elaborate,
showing thirty-six atoms instead of fourteen. In this way the clever
builders have piled up in zirconium no less than 1624 atoms.

ZIRCONIUM: One Carbon atom 216
4 _c_ of 212 atoms 848
12 _d_ of 36 " 432
Central globe 128
----
Total 1624
----
Atomic weight 89.85
Number weight 90.22
[Illustration: PLATE XVI.]

SILICON (Plate XVI, 1) is at the head of the group which corresponds to
carbon on the opposite turn of the lemniscate. It has the usual eight
funnels, containing four ovoids in a circle, and a truncated "cigar" but no
central body of any kind. All the funnels are alike.