96 



PHYSIOLOGICAL KEGULATIONS 



A^-4Wln.t.al = -2.06/o 



0.6 



Hours 



Fig. 56. Amounts of water voluntarily ingested (% of Bo) in relation to time 

 after drinking was allowed. In Pj the deficit (-AW) was 4.48% of Bo at zero time; in 

 A4 it was 2.06%. In Pj, 1.45 hours were required for half recovery, in A^ 0.75-hour. 

 New data. The curves very roughly correspond to equations: AW = -0.63 log t and 

 AW=-L22 1ogt. 



The ingestions are always found to be leisurely, after the first 

 minute or two, and their rates decrease with time (fig. 57). At 1.0 

 hour the total amount drunk is usually only half or less of the orig- 

 inal deficit of water as measured by body weight (fig. 58) . Nothing 

 being known about the efficient causes of this characteristically 

 slow drinking, other sorts of "reasons" for it may be imagined. 

 10 



Hours 

 Fig. 57. Eate of water ingestion (% of Bo/hour) in relation to time after drinking 

 was allowed. Each rate is plotted at the middle of the period observed. Same data as 

 in figure 56. 



