J. W. Fewkes—Dissipation of Electricity by Flames. 207 
1. When the primary magnetizing circuit was made and in- 
stantly broken, a tertiary current was excited by the vibrations 
which was less in amount and opposite in ; ark to the 
secondary current arising from the magnetism of the bar. 
2. When the primary magnetizing circuit was made perma- 
nently, or in other words, while the bar was a permanent elec- 
tro-magnet, the tertiary currents were in the same direction as 
the secondary ; and in the case of soft iron uniformly greater. 
: en the rod formed the core of the magnetizing helix 
the tertiary currents were in the same direction as the second- 
ary currents; and when the magnetizing circuit was broken 
they were, in the case of soft iron, greater than the secondary 
curren 
4. When the magnetizing circuit was made while the rod 
was in a state of vibration the tertiary currents were opposite 
in direction to the primary, and in several instances more than 
one was obtained at each trial. 
No. XIIL—Experiments on the Dissipation of Electricity by 
Flames ; by J. W. FEWKEs. 
e experiments are given below. 
Experiment 1.—An alcohol lamp, carefully insulated, was 
connected with the electrometer. The sections of the quadrant 
to which it was attached were then charged by means of the 
vulcanite plate, the opposite sections being at the same time in 
connection with the earth. The lamp was then carefully 
spot of light, which had been deflected to the 
ge of the scale by the charge, quickly returned to the zero 
Saree indicating a quick dissipation of the electricity by the 
flame. 
Exp. 2.—The same conditions as those in Exp. 1 were ob- 
served, with the exception that a Bunsen burner was substi- 
tuted for the alcohol lamp. The dissipation of electricity was 
the same as before, and took place, as near as could be observed, 
at the same rate as before. 
, . 8.—I then substituted for the Bunsen flame a very fine 
_ jet of light, obtained by passing the gas through a finely 
poin 
ted glass tube. The results obtained from this experiment 
