RESULTS OF SCIENTIFIC RESEARCH IN PRACTICE. 219 



brewing station of the Royal Agricultural College in Berlin, 

 made the following significant statement of the situation in 

 1888 1 : 



" Without the exact study of Hanserts pioneering inves- 

 tigations, and without their utilisation, no one at the present 

 time is able to permanently resist the competition in the 

 brewing industry. Hanserfs researches have brought about 

 a revolution in the brewery, especially with regard to the 

 treatment of the yeast." 



Professor Bclohoubek, of the Bohemian Polytechnic at 

 Prague, says in his well-known biography of Hansen, 1 889 2 : 



" No one will be surprised that the establishment of the 

 principle of pure yeast-cultivation, and the truly crushing 

 criticism concerning the general custom of leaving fermenta- 

 tions in the brewery to chance which until then prevailed, 

 and, above all, that the actual introduction into the brewery of 

 pure cultivated yeast prepared by Hansen's method, produced 

 at first astonishment amongst practical men with some 

 honourable exceptions then ridicule, and finally provoked 

 hostile opposition ; for it is known to the initiated what 

 obstinate conservatism there is in brewing circles, where 

 all innovations and reformatory efforts are not only met 

 with passiveness and mistrust, but are sometimes most 

 tenaciously resisted. Fortunately many important factors 

 were united in the struggle against the opposition, which 

 finally suffered a decided defeat in spite of the support 

 of some theoretical specialists, more particularly in North 

 Grermany and Austria-Hungary. It was chiefly the correct- 

 ness of Hansen's views which contributed to this victory, 

 and which completely convinced the most eminent authori- 

 ties of Europe on the science of fermentation; secondly, 

 the fact that able experts also outside Denmark began 

 to experiment with pure yeast-cultivation; thirdly, the 



1 Chemiker-Zeitung, 29 Dec., 1888, p. 1749. 



2 Zeitschrift f. d. ges. Brauw., Munich, 1889, p. 505. 



