NERVOUS SYSTEM 



55 



TABLE 40 



The percentage of solids in brains of rats of various ages kept from four to eighteen 

 weeks in solutions of 4 'P er cen ^ formaldehyde (computations made from original 

 brain weights) 



7. Sense organs. The cochlea makes 2| turns (Fortuyn, '14, 

 p. 348). 



8. Integument (see references). 



9. Gastro-pulmonary systems. For the weights of the various 

 viscera see tables 68-72. 



a) Gastro-intestinal system. The volumes of the liver and pan- 

 creas cells with those of their respective nuclei have been de- 



