The Growth and Calcification of the Humeri of Male and Female New Hampshire Chickens Having Crooked Keels

Abstract

An experiment now in progress at the Kentucky Agricultural Experiment Station studies the comparative growth and calcifications of certain bones of the male and female New Hampshire chickens having straight and crooked keels when raised under normal conditions. The data presented herein mainly concerns the comparative growth and calcification of the humeri of male and female chickens having crooked keels and are compared, in part, with data previously obtained by the authors (1948) concerning the growth of this bone in males and females having straight keels. Other comparisons will be made in this paper by figures and discussions between the humeri of males and females having straight and crooked keels.The humerus is the first segment of the arm, and in the chicken is dorsolateral to the thorax and is parallel to the spine when not in use. This bone is strong and slightly curved, with an ovoid head at .