WATER RELATIONS OF MAN 



99 



It may be said that water ingestion in man is most rapid when 

 drinking begins. Over a smooth course of intermittent drinking 

 the rate diminishes for an hour or more. In contrast with the dog, 

 drinking is very slow and prolonged (Adolph and Dill, '38), as 



3 



a 

 O 



O 



Water Load 



Fig. 60. Eates of water output (% of Bo/hour) in relation to water load. Loads 

 (% of Bo) are equivalent to decreases of body weight over periods of 1 to 4 days of 

 usual food intake but inadequate water intake. All rates of output were measured 

 over periods of 0.2 to 3.0 hours; total by loss of body weight and urine; insensible by 

 basal loss of weight lying on a Sauter balance; urinary by collected output. Each letter 

 designates one individual. New data on 4 subjects; and N 1 reported by Hall and 

 McClure ('36). Urinary plus insensible do not here equal total because separate tests 

 and conditions were concerned in each. 



though overshooting of content at balance were fearingly avoided. 

 Water loss by the paths of urinary and of evaporative outputs 

 diminishes significantly. Both the augmented drinking and the 

 diminished loss contribute to the prolonged recoveries from states 

 of water deficit. 



