232 PRESENT POSITION OF 



CHAPTER VII. 



ON THE PRESENT POSITION OF MY SYSTEM OF 

 PURE YEAST CULTURE. 



i. THE OBJECT OF THIS REVIEW. 



IN papers published in the ' Compte-rendu des travaux du 

 laboratoire de Carlsberg,' and likewise in the first part of 

 this book, I have given an account of my methods for the 

 pure cultivation, analysis and treatment of yeast, both in the 

 brewery and in the laboratory. 



Every investigation which seeks to radically change an 

 old deeply-rooted opinion will, of necessity, meet with opposi- 

 tion, and this will be redoubled when the subject treated of 

 is not only of theoretical, but also of practical interest. 

 Nothing, however, will advance a matter of this kind more 

 than favourable practical results. The investigator who de- 

 sires to bring about reforms of a practical nature must not 

 consider it beneath his dignity to assist in the practical work 

 itself ; it is indeed here that the battles are to be won. Mere 

 theoretical deductions and proofs are of little avail. It is, of 

 course, evident that the work must have a scientific founda- 

 tion. 



In 1888 I gave an account of the position to which my 

 system had then attained, and in this I enumerated the 

 breweries m which the pure yeast propagating apparatus had 

 been introduced. This publication produced a good effect, 

 especially on account of the exact addresses of the breweries 

 in question, which it contained. Practical brewers were thus 



