The Correlation between the Time of Beginning and the Time of Cessation of Laying in the First and Second Laying Year in the Domestic Fowl.

based upon them. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Time of beginning of laying in the first year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Time of beginning of laying in the second year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Time of cessation of laying in the first year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Time of cessation of laying in the second year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 The correlation between egg-laying activity at various periods. . . . . . . . . . . . . . . . . . . . . 46 The correlation between the time of beginniig of laying in the two years. . . . . . . . . . . . 46 The correlation between the time of cessation of laying in the two years. . . . . . . . . . . . . . 48 The correlation between the time of beginning of laying in the first year and the time of cessation of laying in the first year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 The correlation between the time of beginning of laying in the second year and the time of cessation of laying in the second year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 The correlation between the time of cessation of laying in the first year and the time of beginning of laying in the second year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 The correlation between the time of beginning of laying in the first year and time of cessation of laying in the second year.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , 60 DISCUSSION.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 SUMMARY AND CONCLUSIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 LITERATURE CITED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 APPEmnr,-Tables.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 The distribution of time of beginning and cessation of laying, and the statistical constants