INDEX 275 



Tables — Continued 



5. Influence of size of litter on the individual birth weight 25 



6. Individual birth weight in relation to body weight of mother 25 



7. Sex ratios and average number for litter 26 



8. Ano-genital distance in young albino rats 27 



9. Maximum body weights 28 



10. Distance of ova from fimbria at various ages 31 



11. Volumes of ova and embryos 32 



12. Measurements of cranium 35 



13. Range and rate of increase in cranial characters 36 



14. Length of incisors 38 



15. Measurements of enamel 38 



16. Growth of incisors and of cranium 38 



17. Xumber of fibers and of nuclei in Muse, radialis r 39 



18. Percentage of water in blood 40 



19. Number of erythrocytes, leucocytes, etc., in blood 40 



20. Wandering cells in blood 41 



21. Wandering cells in peritoneal fluid 41 



22. Mitoses in brain and cord. Hamilton ('01) 42 



23. Mitoses in brain and cord — special observations on cerebellum 42 



24. Diameters of Purkinje cells and their nuclei 43 



25. Number of myelinated fibers in the oculomotor nerve 44 



26. Range of diameter in cells of cervical ganglion 44 



27. Xumber of spinal ganglion cells and number and size of myelinated root fibers of spinal 



nerves from three levels and at five ages (body weights) 45 



28. Number of ganglion cells and of root fibers in the second cervical nerve 46 



29. Number of myelinated fibers in the ventral and dorsal roots of the second cervical 



nerve — together with the distal excess of fibers in the nerve 46 



30. Number of ventral root fibers in the second cervical nerve at different ages — together 



with the areas of the fibers and of their axes 47 



31. Diameters of cell body and of nucleus in second cervical spinal ganglion together 



with standard deviation and coefficient of variation 48 



32. Number of myelinated fibers in the peroneal nerve 48 



33. Sectional areas of largest fibers and of their axes — in peroneal nerve 49 



34. Myelinated fibers less than 4jl* in diameter in the ventral roots of the second to the 



fifth cervical nerves 49 



35. Effects of various fixing solutions on the weight of the brain 50-51 



36. Increase in the weight of rats' brains in a neutralized 4 per cent formaldehyde solu- 



tion, made five months before using 53 



37. Increase in the weight of rats' brains in a neutralized 4 per cent formaldehyde solu- 



tion made at the time of using 53 



38. Increase in the weight of rats' brains in a neutralized 4 per cent formaldehyde 



solution — freshly made for each lot of animals 54 



39. Increase in the weight of rats' brains in a non-neutralized solution of 4 per cent for- 



maldehyde freshly made for each lot of animals 54 



40. Percentage of solids in rats' brains after fixation in various 4 per cent formaldehyde 



solutions 55 



