BULLETIN 234. 



ABSTRACTS OF PAPERS PUBLISHED BY THE STA^ 

 TION IN 191 5 BUT NOT INCLUDED IN THE BULLE- 

 TINS. 



A complete list of all the publications issued by and from the 

 Station in 1914 are given on pages IX to XI of the introduction 

 to this Report. The following pages contain abstracts of the 

 papers issued during the year that are not included in the Bul- 

 letins or Official Inspections for the year. 



Some PHYSior,oGiCAiv Observations Regarding Plumage 

 Patterns.* 



This study was undertaken with the object of carrying the 

 analysis of the genetic factors for color pattern somewhat far- 

 ther than has hitherto been done. In many forms of domestic 

 poultry the plumage of particular parts of the body displays on 

 each feather a definite and regular pattern. Experimental 

 studies show that these patterns are inherited in a clean-cut 

 Mendelian manner. In the case of the Barred Plymouth Rock 

 color pattern, which has been more thoroughly studied in regard 

 to its inheritance than any other single plumage pattern in 

 birds, extensive investigations in this laboratory and elsewhere 

 indicate that this barred pattern is represented in the gametes 

 by a single Mendelian factor or gene. The manner in which this 

 gene operates physiologically presents a problem of great inter- 

 est, since it involves an element of morphogenetic localization. 



With a view of getting further light on this matter a study has 

 been made of the successive regeneration of feathers, m which 

 special attention has been paid to the comparison of the pattern 

 shown in the regenerates and in the original feather. 



*This is an abstract of a paper with the same title by Raymond Pearl 

 and Alice M. Boring published in Science, N. S., Vol. XXXIX, No. 995, 

 pp. 143-144, January 23, 1914. 



