84 Richard Adie on the 
8d. To the first party who delivers 25 maunds, 100 
rupees. 
To conduct the operations under my orders at the Holta 
plantation, which, up to the 3lst December 1852, were carried 
on by an active and intelligent native, a first class pupil of 
Delhi College, Hurdeo Sahae, I have, with the permission of 
the Honourable the Lieutenant-Governor, transferred Mr 
Rogers, overseer at Bheemtal, in Kumaon, who has for seve- 
ral years superintended the tea plantation in that district, 
and is, therefore, well acquainted with his work. I trust 
that this arrangement will meet with the sanction of the 
Most Noble the Governor-General. 
On the Generation of Electrical Currents. By RICHARD 
AvIE, Esq., Liverpool. Communicated by the Author. 
My object is to give an experiment, which goes to shew that 
a body may be electrified negatively or positively under cer- 
tain conditions that are determined by a change in the 
conducting circuit, so that a terminal wire shall exhibit 
either kind of electricity at pleasure, without any alteration 
in the generation of the current. This fact being esta- 
blished, it will serve to explain cases of the reversal of a cur- 
rent, where there is no apparent change in the chemical or 
molecular action which has produced the electricity. The 
experiment is founded on one I published in vol. xxxvii., 
p- 301, of this Journal. A figure of the cross for testing 
M. Peltier’s law is there given, to illustrate some experi- — 
ments to disprove the assertion that a current of electricity — 
could, in passing across a joint, cool it. Since that time I 
have given experiments to shew that when a joint appears 
to be cooled by an electrical current, the reduction of tem- 
perature can be traced to the cells of the battery where 
the electricity is being generated; and that the current 
which appears in the outer arms of the cross is not gene- 
rated at the central joint, but is merely an off-shoot, drawn | 
by the resistance of the joint from the main current. This 
was suspected when the cross experiment was first proposed ; 
and they devised a method for testing the question, which, 
