ss 60 = 189
But strange to say _also_

Ruthenium (bar) 132 less 60--72
Rhodium 134 less 60--74
Palladium 136 less 60--76
But 72, 74, 76, are Iron, Cobalt and Nickel.

So there does probably exist a new group with bars (183), 185, 187, 189,
with atomic weights.

X=bar 185; atoms 2590, wt. 143.3
Y= 187, 2618, wt. 145.4
Z= 189, 2646, wt. 147.0.
They come probably among the rare earths. Probably also Neodymium and
Praseodymium are two of them, for their weights are 143.6, 140.5.

* * * * *

CHAPTER III.

THE LATER RESEARCHES.

The first difficulty that faced us was the identification of the forms seen
on focusing the sight on gases.[2] We could only proceed tentatively. Thus,
a very common form in the air had a sort of dumb-bell shape (see Plate I);
we examined this, comparing our rough sketches, and counted its atoms;
these, divided by 18--the number of ultimate atoms in hydrogen--gave us
23.22 as atomic weight, and this offered the presumption that it was
sodium. We then took various substances--common salt, etc.--in which we
knew sodium was present, and found the dumb-bell form in all. In other
cases, we took small fragments of metals, as iron, tin, zinc, silver, gold;
in others, again, pieces of ore, mineral waters, etc., etc., and, for the
rarest substances, Mr. Leadbeater visited a mineralogical museum. In all,
57 chemical elements were examined, out of the 78 recognized by modern
chemistry.

In addition to these, we found 3 chemical waifs: an unrecognized stranger
between hydrogen and helium which we named occultum, for purposes of
reference, and 2 varieties of one element, which we named kalon and
meta-kalon, between xenon and osmium; we also found 4 varieties of 4
recognized elements and prefixed meta to the name of each, and a second
form of platinum, that we named Pt. B. Thus we have tabulated in all 65
chemical elements, or chemical atoms, completing three of Sir William
Crookes' lemniscates, sufficient for some amount of generalization.

[Illustration: PLATE I. SODIUM.]

In counting the number of ultimate atoms in a chemical elemental atom, we
did not count them throughout, one by one; when, for instance, we counted
up the ultimate atoms in sodium, we dictated the number in each convenient
group to Mr. Jinarajadasa, and he multiplied out th