BULLETIN No. 192. 



BREEDING POULTRY FOR EGG PRODUCTION.* 



• BY 



Raymond Pearl. 



PART I. 



Summary op EaruiSr Work. 



Since 1898 an investigation in breeding Barred Plymouth 

 Rock fowls for increased egg production has been in progress at 

 the Maine Station. This work was put under the direction of 

 the present writer in 1907. No systematic or detailed report of 

 the results obtained was, made until 1909. Since that time a 

 number of papers have been published dealing with one phase 

 or another of these experiments. A list of these papers fol- 

 lows.** 



1. Data on the Inheritance of Fecundity obtained from the 

 Records of Egg Production of the Daughters of "200-egg" 

 Hens. Maine Agl. Exp. Stat. Ann. Rpt. for 1909, -pp. 49-84, 



(Bulletin 166). 



2. A Biometrical Study of Egg Production in the Domestic 

 Fowl. I. Variation in Annual Egg Production. U. S. Dept. 

 Agr. Bur. Anim.' Ind. Bulletin no, Part I, pp. 1-80, 1909. 



3. A Biometrical Study, etc. II. Seasonal Distribution of 

 Egg Production. Ibid. Part II, pp. 81-170, 191 1. 



4. Is there a Cumulative Effect of Selection? Data from 

 the Study of Fecundity in the Domestic Fowl. Zeitschr. f. ind. 

 Abst. u. Vererbungsl. Bd. 2. pp. 257-275, 1909. 



* Papers from the Biological Laboratory, Maine Agricultural Experi- 

 ment Station, No. J2. 



** Dr. Frank M. Surface, formerly Associate Biologist of this Station,- 

 is a joint author (with R. Pearl) of Nos. i-S inclusive of the papers 

 listed. The other papers cited are by R. Pearl. 



