114 Dr. Faraday’s Experimental Researches in Electricity. 
its length: but that EmprricaLty he found upon a compari- 
son of numerical results, “ that this relation appears to sub- 
sist,” which is expressed by the above formula. Such is the 
impression which the passage conveys to my mind; and, in- 
deed, the tenor of the whole confirms it. I can only add, that 
I should be truly glad to have pointed out any deduction from 
theory which would give so simple a formula. 
Considered as an empirical law, it certainly merits great 
attention. But thus much will be at once evident,—it is totally 
independent of M. Cauchy’s principles, and of my results de- 
duced and calculated on those principles. 
Oxford, Jan. 6, 1836. 
XXIII. Experimental Researches in Electricity.—Tenth Se- 
ries. By Micuaret Farapay, D.C.L. F.R.S. Fullerian 
Prof. Chem. Royal Institution, Corr. Memb. Royal and Imp. 
Acadd. of Sciences, Paris, Petersburgh, Florence, Copen- 
hagen, Berlin, &c. &c.* 
§ 16. On an improved form of the Voltaic Battery. § 17. Some 
practical results respecting the construction and use of the 
Voltaic Battery. 
1119; l HAVE lately had occasion to examine the voltaic 
trough practically, with a view to improvements in 
its construction and use; and though I do not pretend that the 
results have anything like the importance which attaches to 
the discovery of a new law or principle, I still think they are 
valuable, and may therefore, if briefly told, and in connexion 
with former papers, be worthy the approbation of the Royal 
Society. 
§ 16. On an improved form of the Voltaic Battery. 
1120. In a simple voltaic circuit (and the same is true of 
the battery) the chemical forces which, during their activity, 
give power to the instrument, are generally divided into two 
portions; the one of these is exerted locally, whilst the other 
is transferred round the circle (947. 996.) ; the latter consti- 
tutes the electric current of the instrument, whilst the former 
is altogether lost or wasted. ‘The ratio of these two portions 
of power may be varied to a great extent by the influence of 
circumstances: thus, in a battery not closed, all the action is 
local; in one of the ordinary construction, much is in circula- 
* From the Philosophical Transactions for 1835, Part [I]. This paper was 
received by the Royal Society June 16th, and read June 18th, 1835. 
[+ The paragraphs of the author’s former series of Researches here refer- 
red to, from 875 to 1047 both inclusive, belong to his Eighth Series, re- 
printed in Lond, and Edinb, Phil. Mag., vol. vi. p. 34 et seg. —Enir. ] 
