ANALYSIS OF THE GALVANIC PILE. 113 



they melted, and diffused a strong smell of horseradish, suc- 

 ceeded by a smell of peppermint, and lastly of camphor. 

 ^s the heat increased they were entirely dissipated. 



The horseradish remaining in the retort, being mixed with 

 water, yielded a few more drops of oil, and a distilled wa- 

 ter, with all the properties mentioned above. 



I must observe, that, having subjected to analysis some Deep buried 

 mould, dug up from a depth of twenty feet, I obtained an ^ s l ^ # an " 

 ammoniaeal water, hidrogen gas, and carbonic acid. This Smell of 

 compound gas lost its fetid smell, and after a time smelled 10rber * ls ■ 

 like horseradish. The water remaining in the jars in which 

 this gas had been collected threw down a black precipitate 

 with solution of silver, which appears to indicate the pre- 

 sence of sulphur. 



IX. 



Analysis of the Galvanic Pile* By J. A. De Lug, Esq* 

 F.R.S. 



Part L 



1 J N January 1806, I had the honour of presenting to the Works on 

 Royal Society two works, connected with each other by the meteorolo Ky- 

 common object of meteorology, published at Paris in 1903 

 mid 1804, under the titles of Tvtrodvctiov A la Physique 

 terrestre paries Fluidrs expansibles, # Traite E'imenfaire sur 

 le Fluide ileciro-galvanique. In the latter of these works I 

 had proved, by direct experiments, that it was the electric Electricity 

 fluid itself, which acted in the galvanic pile: but that it un- &£%?** 

 derwent there a modification, which made it produce, with 

 an excessively small quantity, some effects, which else it 

 could not produce but with a verv great quantity set in mo- 

 tion by the discharge of the Leyden vial, and even of batte- 

 ries. This fundamental proposition was established in my 

 work by a particular mode of analysis of the effects of -the 

 pile, which however other avocations obliged me to publish 

 Unfinished, but expressing the hope, that some other expe- 

 Vol. XXV 1.— June, 1810. I ri mental 



