IOO RESEARCH WITH SCORESBY. 



Rev. William Scoresby, D.D., F.R.S.S.L. and E., Corr* 

 Mem. Inst. Fr., &c, and James P. Joule, Secretary of the 

 Literary and Philosophical Society of Manchester, Mem. 

 Chem. Soc. &c." 



To the reprint of this paper in 1885, Joule adds the 

 following interesting note : — 



" On the occasion of the meeting of the British Asso- 

 ciation for the Advancement of Science, at Manchester, in 

 the year 1842, I had the happiness of forming the acquaint- 

 ance of Dr. Scoresby, eminent for qualities seldom united 

 in one man. At once an experienced seaman, a successful 

 geographical discoverer, a hard working and eloquent 

 clergyman, he was also a zealous student of nature and a 

 scientific investigator. Dr. Scoresby became greatly inter- 

 ested in the view I was at that time beginning to take 

 of the relation, between heat and other forms of force, and 

 in response to my express wish to work with a powerful 

 arrangement of magnets, he kindly invited me to Bradford,, 

 of which town he was at the time Vicar, in order to pursue 

 an inquiry along with him. The duties of the parish were, 

 however, so onerous and pressing, that the production of our 

 paper devolved almost entirely on myself, so that it was not 

 without great objection on his part that Dr. Scoresby 

 allowed his name to appear with mine. Inasmuch, how- 

 ever, as the facilities for the experiments were afforded by 

 him, as well as the great magnetic battery, I felt that I could 

 not, in justice, allow it appear other than as a joint paper." 



The final results of this investigation, which are of 

 great interest, may be shortly summarised as follows : — The 

 duty of an electro-magnetic engine per grain of zinc con- 

 sumed in a Daniell's battery, is 8olb. raised one foot high, 

 about half the theoretical maximum duty. The duty of a 



