seven atoms in its middle body
instead of four. In this way does vanadium succeed in overtopping scandium
by 126 atoms.

VANADIUM: 3 funnels (A) of 160 atoms 480
3 " (B) " 137 " 411
Central globe 27
----
Total 918
----
Atomic weight 50.84
Number weight 918/18 51.00
NIOBIUM (Plate XII, 3) is as closely related to yttrium as is vanadium to
scandium. The little globes that scamper round the "cigars" contain twelve
atoms instead of eight (see 4 _e_).

The rest of the funnel is the same. In the central globe both the
tetrahedra have "cigars," and a central nine-atomed globe spins round in
the centre (see 4 _f_), seventeen atoms being thus added.

NIOBIUM: 6 funnels of 277 atoms 1662
Central globe 57
----
Total 1719
----
Atomic weight 93.25
Number weight 1719/18 95.50
III a.--Aluminium, gallium and indium were examined from this group. They
are triatomic, diamagnetic, and positive. The corresponding group contains
phosphorus, arsenic and antimony: bismuth also belongs to it, but was not
examined; they are triatomic, diamagnetic and negative. They have no
central globes.

[Illustration: PLATE XIII.]

ALUMINIUM (Plate XIII, 1), the head of the group, is, as usual, simple.
There are six similar funnels, each containing eight ovoids, below which is
a globe.

ALUMINIUM: 6 funnels of 81 atoms 486
Atomic weight 26.91
Number weight 486/18 27.00
GALLIUM (Plate XIII, 2) has two segments in every funnel; in the segment to
the left a "cigar" balances a globe, equally six-atomed, in that of the
right, and the globes to right and left are four-atomed as against
three-atomed. In the next row, the smaller contained globes have six atoms
as against four, and the cones have respectively seven and five. By these
little additions the left-hand funnel boasts one hundred and twelve atoms
as against ninety-eight.

GALLIUM: Left segment 112 atoms }
Right segment 98 " } = 210
6 funnels of 210 atoms 1260
----