522 Mr. Faraday on the Condensation of the Gases, Sc. 
peated the experiments together. I may remark that this is 
aproof that Dr. Davy, in the Life* as well as elsewhere+, does 
not always understand the meaning of his brother’s words, 
and I think that he would never have written the lines which 
have driven me to the present and a former replyt if he had. 
Immediately upon Oersted’s great discovery, the subject was 
pursued earnestly, and various papers were written, amongst 
which is one by Sir Humphry Davy, Phil. Trans. 1821, 
page 7, read before the Royal Society Nov. 16, 1820, in which, 
at page 17, he describes the rolling of certain wires upon knife- 
edges, being attracted when the north pole of the magnet was 
presented under certain conditions of current, and repelled 
under certain other conditions of current, &c. 
Another paper was a brief statement by the Editor of the 
Quarterly Journal of Science, (Mr. Brande,) in which he an- 
nounces distinctly and clearly Dr. Wollaston’s view of the na- 
ture of the electro-magnetic force, and its circumferential cha- 
racter. It is in the tenth volume, p. $363, and may be dated 
according to the number of the Journal, Ist January 1821. 
Then there are my historical sketches in the Annals of 
Philosophy, N.S., vols. ii. and iii. written in July, August, and 
September 1821, and the paper describing my discovery of 
the electro-magnetic rotation dated 11th September 18218, 
and others; but we will pass on to that of Sir Humphry Davy, 
read 6th March 1823)|, which with its consequents is synchro- 
nous with the affair of the condensation of gases. ‘This is 
the paper which Dr. Davy says “he (Sir H. D.,) concludes 
by an act of justice to Dr. Wollaston, pointing out how the 
discovery of the rotations of the electro-magnetic wire round 
its axis by the approach of a magnet, realized by the inge- 
nuity of Mr. Faraday had been anticipated, and even at- 
tempted by Dr. Wollaston in the laboratory of the Royal 
Institution {”. 
I have elsewhere** done full justice to Dr. Wollaston on the 
point of electro-magnetic rotation, and have no desire to lessen 
the force of anything I have said, but would rather exalt 
it. But as Dr. Davy has connected it with the condensation 
of the gases, I must show the continual tendency to error 
which has occurred in both these matters. Dr. Davy, then, is 
in error when he says I realized Dr. Wollaston’s expectation ; 
nor does Sir Humphry Davy say what his brother imputes to 
him. I did not realize the rotations of the electro-magnetic wire 
* Vol.ii.p.143. + Lond. and Edinb. Phil. Mag., 1835, vol. vii. p. 340. 
t Ibid. p. 337. § Quarterly Journal of Science, vol. xii. p. 74. 
|| Phil. Trans. 1823, p. 153. q Life, vol. ii, p. 160. 
** Quarterly Journal, vol. xv. p. 288. 
