THIS group comprises those elements sometimes known as the Interperiodics. They occur in the pendulum diagram on the central line, alternately with the inert gases of the Star Group. They are all metals and have a maximum valence of eight.

When examined these elements were seen to have a striking configuration. Their general appearance is shown in Fig. 140. They consist of seven equal rods piercing a cube, three through the six middle points of its surfaces and four through its corners. There are therefore seven crossed bars whose directions in space are fixed by the cube. They may also be considered as consisting of fourteen half bars, all the half bars being identical. It should be clearly noted that there is no cube, nor outline of a cube to be seen in the element itself. The half-bars interlock in the centre of a sphere. The cube has been drawn simply to indicate the directions in space of the half-bars.

The elements in this group occur as closely associated sets of three. Three of these groups of three are known to science and a fourth group has been observed by clairvoyance and is here described. Within a group of three the difference between one member and its successor is 28 Anu, that is to say two extra Anu in each half-bar.