GENETIC STUDIES OF RABBITS AND RATS. 



41 



TABLE 29. Correlation of tibia with femur. 



Mean tibia, 93.690.19. S. D. tibia, 5.480.14. 



Mean femur, 80.76 0.18. S. D. femur, 5.19 0.12. r, 0.927 0.005. 



TABLE 30. Correlation coefficients derived from tables 12 to 29. 



TABLE 31. Number of size factors indicated by each set of measurements as differentiating 



the three races crossed. 



