AUG 8 
1924 
the interrelationship of the log records 
OF VARIOUS PERIODS DURING THE FIRST AND 
SECOND YEAR OP' THE WHITE LEGHORN LOW L 
J. ARTHUR HARRIS AND II 
R. I.RWIS 
Station for Experimental Evolution, Cold Spring HarlK)r Long Lslaiul, 
and New Jersey Agricultural Experiment Station, New Brunswick, New 
Jersey. 
I. Introduction 
The primary purpose of this paper is to consider the into- 
relationship of the egg records of various periods during the 
second laying year of the White Leghorn fowl. It is, therefore, 
a continuation of earlier investigations in this general field, 
which have, of necessity, been limited to a consideration of the 
relationship between the periods of the first or pullet year (Han is 
and others, 1917-1921). 
While our primary purpose has been the investigation of the 
correlations for the second laying year, these interrelationships 
can be fully understood only when considered m comparison 
with the like coefficients for the first year. 
Fortunately the extensive data of the \ ineland International 
Egg Laying and Breeding Contest permits the consideration of 
the complete first and second year record of 443 individual V lute 
Leghorn birds. Our problem is, therefore, to consider all of the 
more important correlations between the egg records of the 
periods of the second year, and to compare them with the homo¬ 
logous coefficients for the periods of the first year. Thus, while 
the present investigation marks an entirely new advance in the 
investigation of the inter-periodic correlation in the egg laying 
activity of the domestic fowl (in that it deals with the pioduc- 
tions of the second laying year, which have hitherto received but 
* Papers from the Station for Experimental Evolution. Also Paper 71 ot 
the Journal Series, New Jersey Agricultural Experiment Station, 
Department of Poultry Husbandry. 
