BULLETIN 268 



ABSTRACTS OF PAPERS PUBLISHED BY THE 

 STATION IN 1917 BUT NOT INCLUDED IN THE 

 BULLETINS. 



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

 Station in 1917 is given on pages x to xii 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. 



THE EXPERIMENTAL MODIFICATION OF GERM 



CELLS. 



I. General Plan of Experiments with Ethyl Alcohol. 

 AND Certain Related Substances* 



This paper is the first of a series of studies having to do- 

 with attempts, in the first place, to modify hereditary factors or 

 determinants in a definite and specific way, and in the second 

 place, to observe and analyze the hereditary behavior following 

 such modification. The results here reported followed attempts 

 to modify the germ cells by treating the individual domestic fowl 

 with one or another of three poisons, viz., ethyl alcohol, methyl 

 alcohol and ether. 



The males used were Black Hamburgs. The females were 

 pure bred Barred Plymouth Rocks. Both strains used have 

 been so long pedigree bred, and used in such a variety of Men- 

 delian experiments, that they may be regarded as reagent strains, 

 whose genetic behavior may be predicted with practically com- 

 plete certainly. Analyses of the inbreeding in their parents 

 indicate that the amount of intensitv of this inbreeding is low. 



*This is an abstract from a paper by Raymond Pearl, having the 

 same title and published in the Journal of Experimental Zoology, Vol. 

 22, No. 1, pp. 125-164. 



