SELECTED PAPERS 



after having given due attention to what had been achieved in his 

 own beloved Carlsberg Laboratory. There he would be confronted 

 with the situation that the president of the Emil Christian Hansen 

 'Fond' had revolutionized his science and opened wide prospects for 

 future developments by applying the mighty tool of genetics to the 

 study of the yeasts. Undoubtedly the fact that it has been possible to 

 produce consciously new strains with interesting properties by hybrid- 

 isation would have quite especially appealed to the man who already 

 in 1 89 1 published the first observations, at that time not well inter- 

 pretable, on ascospore copulation in Saccharomyces cerevisiae. The idea 

 that the phenomenon of variability in Saccharomycetes, to which he al- 

 ready half a century ago had devoted so much attention, has at last 

 successfully been submitted to a careful analysis, and gradually is 

 giving up its secrets, would be another reason for rejoicings. 



The realisation that just like in his own days the Carlsberg Labor- 

 atory is still the world's leading centre in yeast science would make 

 even Hansen's stern character break with its principles, and we may 

 presume that he would be unable to withhold words of praise and 

 satisfaction. 



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