RESULTS OF SCIENTIFIC RESEARCH IN PRACTICE. 221 



the full the great advantages of having a beer of better quality 

 and keeping properties than the present beer, advantages 

 which are a result of the employment of pure yeast. 



" The above statements concerning the importance of 

 pure cultivated yeast, refer throughout to beer bottom- 

 yeast only. There could be no doubt even from the 

 first that it would also be possible to employ Hanserts 

 method of pure yeast-culture to top-fermentation yeast, 

 and with the same result ; this has since been proved ex- 

 perimentally by Alfred Jorgensen, and pure top-yeast has 

 proved just as successful in the brewery as pure bottom- 

 yeast. The writer of these lines is convinced that the 

 introduction of pure cultivated species of yeast into dis- 

 tilleries, and especially into pressed-yeast factories, will give 

 very advantageous results. In distilleries other conditions 

 being maintained the same better fermentations and a 

 greater yield of alcohol in comparison with the average now 

 attained are to be expected, whilst in pressed-yeast factories 

 a better yield of yeast should result from a successful selec- 

 tion of a pure cultivated species, and possibly the employment 

 of clear mashes will then be found preferable to mashes con- 

 taining the grains as now employed." 



In Dr. H. Bungener's treatise " La levure de la biere " 

 1890, 1 the following statement occurs, contrasting the old 

 with the new period : " In France, Hanserts system has been 

 eagerly taken up by L. Marx, A. Fluhler, and Kokosinski. In 

 some breweries, it has been recently introduced, and it will 

 soon be adopted by others. We are convinced that its intro- 

 duction into all the larger breweries of France, and in fact 

 everywhere else, will only be a question of time. It has in 

 fact been established, that it ensures regular working and 

 a good result in one of the most important stages of the 

 manufacture, where hitherto chance and, in consequence, also 

 uncertainty prevailed." 



1 Moniteur scientifique du Dr. Quesneville, Juillet-Aoftt, Paris, 1890. 



