186 Faraday as a Discoverer. 
machine, and the other to the gas-pipes of this building. The 
he called his “discharging train.’ On turning the machini 
the electricity passed from paper to paper through the strm ; 
u 
J 
feet without changing the result. The first paper was reddenet, 
declaring the presence of sulphuric acid; the second was browned, 
declaring the presence of the alkali soda, The dissolv salt, 
therefore, arranged in this fashion was decomposed by the ma 
chine exactly as it would have been by the voltaic current. 
When instead of using the positive conductor he used the neg 
ative, the positions of the acid and alkali were reversed. 44 
he satisfied himself that chemical decomposition by the machint 
is obedient to the laws which rule decomposition by the yer 
And now he gradually abolishes these so-called poles to 
attraction of which electric decomposition had been # raf 
He connected a piece of turmeric paper moistened with fr 
sulphate of soda with the positive conductor of his a . 
then he placed a metallic point in connection with » ctrl 
charging train opposite the moist paper, 80 that the ortilg 
shall discharge through the air toward the point. Tha 
of er meee caused the corners of the yee of turmeric Pare 
opposite to the point to turn brown, thus declaring 
oF alkali He changed the turmeric for litmus paps i. 
i it not in connection with his conductor, are Me a 
: wi | 
i 
the machine, aci iberated at the edges 2 
ners of the litmus. sgt a series of pointal oe 
of ee each separate piece being composed © an . 
: litmus and the other of turmeric paper, and the BY 
ed with sulphate of soda, in the line of current from 
chine. The pieces of paper were separated from each 
spaces of air. The machine was turned; and it wo 
0 
ther bY 
alway 
