Mr. Henry on Ferments and Fermentation. 28 1 



•nrjuch fo, as the generality of the ale brewed at 

 public houfes. 



A part of the ale was fubmitted to diftillation ; 

 and, from ir, a quantity of vinous fpirit was 

 produced, which is fubmitted to the examination 

 of the Society. But, the vefiel being broken, be- 

 fore the diftillation was finifhed, the quantity it 

 would have yielded was not afcertained. How- 

 ever, that which was obtained, appeared not 

 to differ much in quantity, from what an equal 

 portion of common ale would have afforded. 



As I had loft my notes, and was obliged to 

 make out the preceding account, from memory, 

 I defigned to repeat the experiments again ; but 

 various engagements prevented me, till the latter 

 endof Auguft 1784. Of thefe experiments the 

 following notes are taken from my journal. 



Auguft 30, I procured two gallons of common 

 ale wort, two quarts of which were, in the even- 

 ing, impregnated, but not faturated, with fixed 

 air. The impregnated liquor was, then, added to 

 the other pare, and, about midnight, placed, 

 in a large jug, within the air of the kitchen 

 fire, where it remained during the ni^^ht. In 

 the morning no figns of fermentation. At five 

 o'clock P. M. only a flight mantling on the 

 furface. Apprehending the quantify of gas to 

 have been too fmall, a bottle, with a perforated 

 ftopper and valve, containing an effervefcing 

 mi^^tqre of chalk and vitriolic acid;, was letdown 

 ' into 



