At the March meeting, Dr. Herman Burgin, 

 of Germantown, gave one of the most interest- 

 ing talks ever given before our society. His 

 subject was: "Advantages to be derived by 

 careful selection and mating of breeders." In 

 a few words he outlined, in a very convincing 

 way, Gregor Mendel's theory of heredity, who 

 after eight years of experimenting, published 

 the results of his work in 1865; but, curious as 

 it may seem, it was not until 1900 that the value 

 and truth of his idea was recognized by some 

 of our most distinguished scientists. Dr. Bur- 

 gin illustrated his talk with a diagram similar 

 to the drawing. 



■ D '- 



HB First Hybrid Generation 



Second Hybrid Generation 



XXjEX jrXXX Thfrd Hybrid Generation 



In brief he said: "Supposing two differently 

 colored fish that were known to breed true to 

 color were crossed — for convenience we will 

 say a black one and a white one — the result 

 would probably be offspring all of one color: 

 again for convenience we will say they are all 

 black, thus making black the dominant color 

 and white the recessive. These offspring are in 

 turn bred, with the result that 75 per cent, of 

 the second hybrid generation are black and 25 

 per cent, are white, or of the recessive strain, 

 any one of which will in the future always 

 breed true to color, generation after generation. 

 Of the other 75 per cent., or those of the 

 dominant type, one-third will be of the pure 

 strain and breed true to color, while the remain- 

 ing two-thirds will breed a mixture of 

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