SYSTEMATICALLY SELECTED YEASTS. 3 



It was only to be expected that my work would meet 

 with marked opposition. This was especially the case at 

 three different points. The first and severest struggle which I 

 had to encounter was with the founder of the laboratory, the 

 late Captain J. C. Jacobsen. He, in fact, regarded my efforts 

 as misdirected, and for a time tried to oppose them. But 

 as soon as he recognised that my discoveries might become 

 of great importance, he at once decided to recommend them, 

 although not always in a manner which I could approve 

 (1883-1884). The experiments which I conducted at that 

 time, in order to convince Jacobsen, became of fundamental 

 importance for the full development of the question, and they 

 will therefore be described in detail in the following pages. 



Shortly afterwards the dispute arose with Prof. Delbriick 

 and his followers in Berlin. My opponents started with the 

 view that a botanical treatment of the yeast question could 

 not lead to the desired end, and that my methods were not 

 suited to the practical conditions of the brewery. They did 

 not content themselves, however, with a verbal dispute, but 

 experimented themselves. By means of these investigations, 

 and some new ones published by myself and my associates, 

 my opponents gradually changed their views, and they have 

 also openly stated so. In 1889 my colleagues at the Berlin 

 Station recognised and adopted my methods in their pro- 

 gramme, and awarded me their diploma as honorary member. 

 Amongst the marks of honour accorded to my work, I valued 

 this especially, as showing that the dispute had been carried 

 on without personal animosity. 



The third important attack was from the French school, 

 at the head of which are the brewer Velten of Marseilles, 

 well known through Pasteur's ' Etudes sur la biere/ and 

 Prof. Duclaux, Member of the Institute of France, and 

 Director of Pasteur's Institute at Paris. Some other pupils 

 of the French school sided with the above. Velten com- 

 menced his attack in 1886, and this was taken up by Duclaux 



B 2 







