A 



JOURNAL 



OF 



NATURAL PHILOSOPHY, CHEMISTRY, 



AND 



THE ARTS. 



FEBRUARY, 1807. 



ARTICLE L 



Account of a Fact, not hitherto observed, that the Galvanic 

 Poicer heats Water while decomposing it in Part. In a 

 Letter from Mr. John Tatum, Jun. 



To Mr. Nicholson. 



JLN the various galvanic communications which I have Circumstance 

 had the pleasure of consulting in your invaluable Journal, as not hitherto 



„ . , , , , ^, , . , . noticedm the 



well as in lectures and volumes on that interesting sub- galvanic de- 

 ject, to which I have attended, I do not recollect any men- compositioii of 

 tion being made on a circumstance attending the decompo- ^^^^^' 

 sition of water, which I observed about two months ago, in 

 preparing for a public lecture I was about to deliver, which, 

 if you think worthy a place in your Journal, is very much 

 at your service. 



In the experiment alluded to I made use of four trouohs ?JP^^'"^^"^j 



^ a Water was de- 



of the following dimensions, viz. two of 26 plates, each composed by 

 plate 60 inches, and two troughs of 25 plates, each plate 36 "oughs of con- 

 \T \r\Tr T? icA-r r< . , siderablc sur- 



VoL. X VI. —Feb. 1807. G inches, face. 



