PERCENTAGE OF DRY SUBSTANCE 



177 



TABLE 75 



Percentages of dry substance in the entire body — in several of the systems and in 

 some organs. Observations at seven ages. See chart 24 



By the use of formulas (40)- (42a) for the brain and formu- 

 las (43)-(45d) for the spinal cord, the values for table 74 after 

 10 days of age were obtained and also those for the respective 

 graphs in chart 26. The data for the first 10 days are from di- 

 rect observations. The percentage of water in the brain and 

 spinal cord is linked with age and is not readily modified. 



