152 



Report S.A.A. Advancement of Science. 



To test whether it was possible to transmit the agency effective 

 in causing the electrification from one space to another, the first 

 arrangement was modified by introducing between the tube (A) and 

 the filter (Fg), a second tube (A), similar in all respects to A. 



(A) was heated , (A) was in the first part of the experiment con- 

 nected to case, and in it was placed a strip of zinc covered with 

 common salt, which had not, however, been treated with iodine. 

 The electrified air from (A), in which was a strip of zinc covered with 

 iodined salt, was allowed to pass through (Aj) before reaching the 

 filter (F^.). After this had been continued for some time (A) was 

 taken awa) and (Aj ) was heated. No electrification was shown on the 

 filter when the air was drawn through it from the tube (Aj ). 



§9. Effect of current. 



The charge given to the gas was not destroyed by passing a 

 current through it. This was tested by an arrangement similar 

 to that described in §8. The gas was charged in (A); it was drawn 

 through (Aj) which contained no substance; the insulated axial wire 

 of (A ) was connected to one terminal and the tube itself tO' the other 

 terminal of a battery of forty Leclanche's. No diminution of the 

 effect on the filter was produced by this means. 



§10. Quantity of electricity given in filter (F,.) by a c.cm. of 

 gas. 



The capacity of the quadrant electrometer with connected 

 filter was 'oooi microfarads. The capacity of a barrel of the pump 

 was 344 cubic centimetres. The quantity of electricity per cm.''' 

 was as follows : — 



Air from Iron Tube 



Coal Gas from Copper Tube 



Air from Phosphorus Tube ... 



„ Zinc Tube with Iodined Salt 



„ „ „ Potassium 



Permanganate 



), „ I) Lithium 



Chloride 



„ „ „ Potassium 



Iodide and Bromine 



Axial Wire. 



+220 



-I- 36 volts 

 -36 „ 



+36 „ 

 -36 „ 



+36 „ 

 -36 „ 



+60 „ 

 —60 „ 



+45 M 



+60 

 —60 



Conlombs 

 per cm.' 



+ 9-0 X I0-' 



— 4-5 X 10-' 



— 10 -o X 10-^ 



— 1-4 X 10-7 

 + i-i X 10-7 



+ 1-2 X 10-7 

 + 0-8 X 10-7 



— 2-8 X 10-7 

 -f 2-2 X 10-7 



+ 6-6 X 10-7 



4- 4-0 X 10-7 

 4- 6-0 X 10-7 



