20 



Scientific Proceedings (46). 



laced the daughter is likewise; i. e., the daughter's lacing comes 

 from the father's side of the house only. 



The explanation is simple on the assumption that the lacing 

 is linked with the sex-chromosome, following the scheme of trans- 

 mission of the sex-chromosome as worked out by Stevens, Wilson 

 and Morgan. While the male of poultry must have two somatic 

 sex-chromosomes the female has only one. Therefore, while all 

 sperm possess a sex-chromosome, only half of the eggs do. In 

 the fertilized egg or zygote that has only one sex-chromosome, this 

 is derived from the father and the zygote becomes a daughter. 

 Hence the daughter "inherits" from the father only. 



The hybrids have been bred together and a second generation 

 has been obtained. When the hybrid male is mated to a white- 

 laced hybrid female all the sons are white-laced while half the 

 daughters are white-laced and half red-laced. But when the 

 hybrid male is mated to a red-laced female half of the sons are 

 white-laced and half red-laced while half of the daughters are 

 white-laced and half red-laced as in the reciprocal mating. This 

 result accords with the hypothesis. 



4 (623) 



The gastric and pancreatic secretions of the newborn- 

 By Alfred f. Hess. 



[From the Department of Health, New York City.] 

 I have been able by means of a simple duodenal catheter to 

 obtain for the first time access to the duodenum in the living 

 infant. This has enabled me to investigate the secretion of the 

 upper part of the small intestine. This catheter is, in brief, merely 

 a Nelaton soft rubber catheter No. 14 (F). That I actually do 

 reach the intestine is proved by X ray photographs which I show. 



The present report concerns solely newborn infants, which had 

 never obtained any nourishment. I have found some interesting 

 conditions not only as concerns intestinal secretions but also 

 regarding the secretion of the gastric juice. It is noteworthy 

 that there have been no previous investigations in this regard; 

 in fact I have been able to find note of only one test of the gastric 

 secretion of the newborn before it has been given food. 



