MR. C. A. BELL ON THE SYMPATHETIC VIBRATIONS OF JETS. 
409 
phenomena is readily proved. It is not difficnlt to arrange a jet-transmitter so that 
no part of the jet or the jet film comes in contact with the electrodes. 
Thus the jet, or the nappe, may make contact between two masses of liquid in 
which the electrodes are immersed. This is easily effected by allowing it to strike 
upon the sharp edge of an insulating (ebonite) partition, P (fig. 9), which separates 
the two masses of liquid, M and M'. At the edge of the partition the jet divides into 
two streams through which the electric circuit is completed. The electrodes E and 
E' are small platinum plates immersed in M and M'. 
Fig. 9. 
Making due allowance for the increased resistance necessarily thrown into the 
circuit, this form of transmitter is very effective. Many other forms of this apparatus 
have been tried, but it is not necessary to describe them here. 
If any further proof be needed, I may give the following. Du Bois Raymond 
has shown that the polarization at the contact of amalgamated zinc with a saturated 
zinc-sulphate solution is practically nil. I have therefore constructed a transmitter, 
having amalgamated zinc electrodes, and a jet of saturated zinc-sulphate solution. 
This transmitter was perfectly effective, the most striking feature about it being that 
very small battery power was required, a single Leclanche element being sufficient. 
Nevertheless it is highly probable that “polarization” plays some part in the 
MDCCCLXXX VI. 3 G 
