30 



Russo, A reply to a note of W. E. Castle etc. 



cal physiology teaches us that the Lecithine in the digestive 

 tube becomes decomposed and is expelled from the tissues, retain- 

 ing only a small part of phosphoric-glicerine acid. Experiments 

 made by me in the same way as Punnet gave me up to 1907 the 

 same results from which it is seen that the proportion of the sex 

 does not change. 



I give here a statistic in which the whole truth is schown, as 

 Castle wishes, a statistic which up to now I have not thought as 

 necessary to publish. 



Regarding the researches of the other authors I have demon- 

 strated that they are wrong in having united the rabbits imme- 

 diately after their confinement, and for this reason there were 

 many embryo deaths, and for the technic of the injection wrongly 

 used, in fact following these injections, as the same author says, 

 several died, others had many and repeated abcesses which were 

 cured by surgery. If all these technical errors, the results of this 

 author, whom Castle calls to his aid, should be taken into con- 

 sideration, let the impartial reader judge!!! 



The accusation however made to me by Castle, and which has 

 also been made to me before by others, is that in compiling my 

 statistics I have chosen confinements in which the sex of the new- 

 born was favourable to my argument. 



A propos I must say that, perhaps I had too much faith in 

 the good sense of some readers, who ought to have understood, 

 without any other explanation, that the confinements were not 

 chosen to deceive the public which would have been too simple! . . . 



From my publications it is however clearly schown that, in 

 rabbits which are injected, in the first confinement, an increase of 

 g is not obtained, because at the moment when the injections 

 had been made the eggs already had acquired a metabolism all to 

 themselves, in this case the effect wished was obtained in the 

 following confinements. These confinements were chosen by me 

 with the sole scope of showing in clearer light the phenomenon 



