W. Crookes— Radiant Matter. 255 
the aluminium wire (e) being positive. Instantly, owing to 
the projection of Radiant Matter from the platinum ring, the 
vanes rotate with extreme velocity. Thus far the apparatus 
has shown nothing more than the previous experiments have 
prepared us to expect; but observe what now happens. I dis- 
connect the induction-coil altogether, and connect the two ends 
of the platinum wire with a small galvanic battery ; this makes 
the ring ec red-hot, and under this influence you see that the 
ee spin as fast as they did when the induction-coil was at 
wo 
rk. 
_ Here, then, is another most important fact. Radiant Matter 
in these high vacua is not only excited by the negative pole 
of an induction-coil, but a hot wire will set it in motion with 
force sufficient to drive round the sloping vanes. 
Radiant Matter is deflected by a Magnet. 
I now pass to another property of Radiant Matter. This 
long glass tube is very highly exhausted ; it has a negative 
pole at one end and a long phosphorescent screen down the 
center of the tube. In front of the negative pole is a plate of 
mica with a hole in it, and the result is, when I turn on the 
current, a line of phosphorescent light is projected along the 
whole length of the tube. I now place beneath the tube a 
powerful horse-shoe magnet: observe how the line of light 
becomes curved under the magnetic influence waving about 
like a flexible wand as I move the magnet to and fro. 
This action of the magnet is very curious, and if carefully 
followed up will elucidate other properties of Radiant Matter. 
Here (fig. 11) isan exactly similar tube, but having at one enda 
small potash tube, which if heated will slightly injure the vacuum. 
T turn on the induction current, and you see the ray of Radiant 
Matter tracing its trajectory in a curved line along the screen, 
under the influence of the horse-shoe magnet beneath. Ob- 
serve the shape of the curve. The molecules shot from the 
