PHILOSOPHICAL TRANSACTIONS 
1. The Bakerian Lecture. — Experimental Researches in Electricity . — Twenty-fourth 
Series. By Michael Faraday, Esq., D.C.L., F.R.S., Fullerian Prof. Chem. Royal 
Institution, Foreign Associate of the Acad. Sciences, Paris, Ord. Boruss. Pour le 
Merite, Eq., Memh. Royal and Imp. Acadd. of Sciences, Petersburgh, Florence, 
Copenhagen, Berlin, Gottingen, Modena, Stockholm, Munich, Bruxelles, Vienna, 
Bologna, 8fc. 8fc. 
Received August 1, — Read November 28, 1860. 
§ 30. On the possible relation of Gravity to Electricity. 
2702 . XhE long and constant persuasion that all the forces of nature are mutually 
dependent, having one common origin, or rather being different manifestations of 
one fundamental power (2146.), has made me often think upon the possibility of esta- 
blishing, by experiment, a connection between gravity and electricity, and so intro- 
ducing the former into the group, the chain of which, including also magnetism, 
chemical force and heat, binds so many and such varied exhibitions of force together 
by common relations. Though the researches I have made with this object in view 
have produced only negative results, yet I think a short statement of the matter, as 
it has presented itself to my mind, and of the result of the experiments, which offer- 
ing at first much to encourage, were only reduced to their true value by most careful 
searchings after sources of error, may be useful, both as a general statement of the 
problem, and as awakening the minds of others to its consideration. 
2703 . In searching for some principle on which an experimental inquiry after the 
identification or relation of the two forces could be founded, it seemed that if such a 
relation existed, there must be something in gravity which would correspond to the 
dual or antithetical nature of the forms of force in electricity and magnetism. To 
my mind it appeared possible that the ceding to the force or the approach of gravi- 
tating bodies on the one hand, and the effectual reversion of the force or separation 
of the bodies on the other, might present the points of correspondence ; quiescence 
MDCCCLI. B 
