222 MICRO-ORGANISMS AND FERMENTATION. 



Prof. C. Lintner, jun., of the Technical College, Munich, 

 writes (1891 ) l : "In the abstracts relating to advances in 

 the brewing industry, the epoch-making investigations of the 

 Danish savant Emil Chr. Hansen, and their application in 

 the breweries, have been frequently reported. A connected 

 account of Hansen's reform and methods, however, has not 

 yet appeared in this journal, though such an account would 

 be by no means undesirable, considering the great importance 

 which the subject has acquired during the seven years since 

 its introduction into the brewing industry. Hitherto, the 

 brewery has mainly benefited from Hanserts system, which, 

 however, has also already found its way into the distillery and 

 pressed-yeast factory, and these branches of the fermentation 

 industry will also be greatly benefited by its introduction." 



In England some of the most celebrated authorities have 

 frankly acknowledged the value of Hansen's investigations. 

 Amongst these is Professor Percy Frankland, who has 

 expressed himself as follows 2 : 



"Emil Christian Hansen, of Copenhagen, has enor- 

 mously extended our knowledge of the alcohol-producing 

 organisms or yeasts; he has shown that there are a num- 

 ber of distinct forms, differing indeed but little amongst 

 themselves in shape, but possessing very distinct proper- 

 ties, more especially in respect of the nature of certain 

 minute quantities of secondary products to which they give 

 rise, and which are highly important as giving particular 

 characters to the beers produced. Hansen has shown how 

 these various kinds of yeast may be grown or cultivated in a 

 state of purity even on the industrial scale, and has in this 

 manner revolutionised the practice of brewing on the 

 continent. For during the past few years these pure 

 yeasts, each endowed with particular properties, have been 

 grown with scrupulous care in laboratories equipped ex- 



1 Dingl. Polytechn. Journal, Jahrg. 72, Bd. 279, Heft 9. 



2 Royal Institution of Great Britain. Meeting, February 19, 1892. 



