AND SOME ANALOGOUS EATS. 
475 
than those near the base of the shadow, wliich consequently becomes distorted to the 
extent of producing at the tip an overlap, with a luminous or negative shadow at 
that part, whilst the remainder of the shadow is of the usual dark or positive sort. 
The preceding observations, and particularly the observation of the lateral shifting 
of the shadow of the wire B in tube [No. G 4], (fig. 6), when the parallel wire C was 
made cathodic, establish the following point Cathode rays are capable of being 
deflected electrostaticcdly; being apparently strongly repelled from a neighbouring 
cathodic surface, and less strongly deflected towards a neighhouring anodic surface. 
Though no precise experiments were made to determine the shape of the path of a 
deflected cathode ray which passes near an anodic or a cathodic point, the observa- 
Fig. 7. 
tions appeared to indicate a hyperbolic path. Incidentalljq these experiments in 
which two shadows of one object were simultaneously produced from two cathodes, 
as in the case of tube [No. G 4], (fig. 7). described above, prove that two cathode 
beams are capable of jiassing through or penetrating one another, just as two beams 
of light will. This was further demonstrated by a special tube [No. G 6], (fig. 8), 
which has two arms at right angles, each ending in a bulb containing a small disk 
cathode. The object, an aluminium wire inserted at the point where the axes of the 
two arms intersect one another, cast two shadows, one on each of the tube-walls 
resjaectively opposite to the two cathodes. If one of these shadows was first produced 
alone no shifting of its position was seen when the second cathode was connected up 
to cast the second shadow. 
2. Electrostatic Deflexion of Cathode Rays by Conductors p)rotected by Glass. 
In the preceding experiments the objects used for giving shadows were of metal, 
their electrified surfaces being exposed directly to the residual gases in the tube, and 
to the cathode rays. It was desirable to ascertain Avhether any such effects were 
4 p 2 
