It is most curious that hydrogen, oxygen and nitrogen, the most widely
spread gases, all differ fundamentally in form from the groups they
reputedly head.[19] Hydrogen was the first chemical element examined by us,
nearly thirteen years ago, and I reproduce here the substance of what I
wrote in November, 1895, for we have nothing to add to nor amend in it.

Hydrogen consists of six small bodies, contained in an egg-like form (the
outer forms are not given in the diagrams). The six little bodies are
arranged in two sets of three, forming two triangles which are not
interchangeable, but are related to each other as object and image. The six
bodies are not all alike; they each contain three ultimate physical atoms,
but in four of the bodies the three atoms are arranged in a triangle, and
in the remaining two in a line.

HYDROGEN: 6 bodies of 3 18
Atomic weight 1
Number weight 18/18 1
I.--THE DUMB-BELL GROUP.

I a.--This group consists of Cl, Br, and I (chlorine, bromine and iodine);
they are monads, diamagnetic and negative.

CHLORINE (Plate V, 2).--As already said, the general form is that of the
dumb-bell, the lower and upper parts each consisting of twelve funnels, six
sloping upwards and six downwards, the funnels radiating outwards from a
central globe, and these two parts being united by a connecting rod (see,
again, sodium, Plate I).

The funnel (shown flat as an isosceles triangle, standing on its apex) is a