254 PRESENT POSITION OF 



the spirit obtained by means of the pure cultivated yeast 

 had a more agreeable taste and odour than usual. 



Experience subsequently recorded was equally favourable 

 (see No. 28 of the same journal). In a distillery where the 

 material employed was a mixture of maize, rye, oats and 

 green malt, a good yield had hitherto been obtained by means 

 of the ordinary impure yeast, but nevertheless, when a trial 

 was made with the pure cultivated yeast, it was found that the 

 yield was increased by 0*2-0*25 per cent. A still more 

 favourable result was obtained when rye was used alone. In 

 the case of a large distillery, in which maize was used, the 

 effect of the employment of pure yeast was to raise the per- 

 centage yield from 1 1 4 to 1 1 * 66. Very satisfactory results 

 are also recorded in the case of a distillery where molasses 

 was used, and of a yeast factory. The results obtained with 

 pure yeast in another yeast factory have, on the other hand, 

 not given satisfaction. Hitherto this is the only unfavourable 

 instance. The same pure cultivated yeast also appears to 

 give a good result in the manufacture of potato spirit. It 

 should be stated that in the cases mentioned, only one race 

 is referred to ; this is called No. II. at the station where it is 

 in continuous cultivation for the supply of pitching yeast to 

 the distilleries belonging to the members of the association. 

 In the distilleries the yeast is always cultivated in the 

 ordinary vessels, but at the station a pure yeast propagating 

 apparatus is of course employed. In a paper published by 

 Delbriick, it is stated that in the year 1893 the station 

 supplied no less than 2647 kilograms of pure yeast to distil- 

 leries. In ' Wochenschr. f. Brauerei/ 1895, he further states : 

 " The pure yeast which I have introduced in Germany has 

 given the most satisfactory results, and it may be stated 

 that all the larger German distilleries of our Association, 

 to the number of 800, employ pure yeast of the race 

 No. II." 



The success of the new reform in distilleries and in yeast 



