THE PROGRESS OF SCIENCE 



93 



amassed the great fortune with which 

 he founded the prizes that bear his 

 name. 



THE DETERMINATION OF SEX 

 At the New Haven meeting of the 

 National Academy of Sciences, held in 

 November, Professor Edmund B. Wil- 



son presented the results of observations 

 that constitute an important step to- 

 wards the solution of the long standing 

 problem of the determination of sex. 

 These observations demonstrate that in 

 several genera of insects, belonging to 

 the Hemiptera, sex is predetermined at 

 least as early as the fertilized egg, and 



