AUTHOR'S PEEFACE. 



Our misfortunes inspired me with the idea of these researches, 

 d I undertook them immediately after the war of ISToXaed have 

 since continued them without interruption, ^^with the determina- 

 tion of perfecting them, and tjierebj; benefiting a branch of 

 industry wherein we are undoubtedly surpassed by Germany 71 



I am convinced that I have found a precise, practical solution 

 of the arduous problem which I proposed to myself — that of a 

 process of manufacture, independent of season and locality, 

 which should obviate the necessity of having recourse to the 

 costly methods of cooling employed in existing processes, and 

 at the same time secure the preservation of its products for 

 any length of time. 



These new studies are based on the same principles which 

 guided me in my researches on wine, vinegar, and the silkworm 

 disease — principles, the applications of which are practically 

 unlimited. The etiology of contagious diseases may, perhaps, 

 receive from them an unexpected light. 



I need not hazard any prediction concerning the advantages 

 likely to accrue to the brewing industry from the adoption of 



