36 



GENETIC STUDIES OF BABBITS AND RATS. 



Mean weight, 2,146.5 ±16.8. S. D. weight, 445.9. 



Mean humerus, 64.26 ±0.14. S. D. humerus. 3.75 ±0.10. r, 0.820 ±0.012. 



Mean weight, 2,143.0±16.9. S. D. weight, 448.0±11.9. 



Mean femur, 80.80±0.19. S. D. femur, 5.03±0.13. r, 0.841±0.011. 



