CORRELATIVES OF WATER CONTENT AND EXCHANGES 



265 



1.7 



i.9 



2A 



2.5 2.6 



20 2.1 2.2 2.3 



Loo Gm Body Weight 



Fig. 133. Intake of free water in relation to body weight. Measurements during 

 every 10 days in 24 male and 27 female white rats from 35 to 155 days of age. For 

 males the line corresponds to the equation: R.^ = 0.039 B"*^; for females, Rw = 0-043 

 B"*". Data of Richter and Brailey ( '29). 



Similarly, the young bovine shows rates of ingestion of pre- 

 formed water such that (fig. 134) R = 0.000119B'-'°; while believed 

 surface area (Brody et al. '28, p. 29) S = 0.31B°-^^ In this case the 

 excellent correlation is a temporary and transitional one, for at 



Body Weight 



Fig. 134. Intake of water as such in relation to body weight. Weekly estimates 

 in 18 to 12 calves on a diet chiefly of milk, from 3 to 26 weeks of age. The line cor- 

 responds to the equation: R^^ 0.000119 Bi-so. Data of Atkeson, Warren and Anderson 

 ('34, p. 252). 



