40 



PHYSIOLOGICAL, EEGULATIONS 



kinetics of recovery from water load. It allows numerical repre- 

 sentation of the very exchanges that constitute adjustment of 

 water content. 



§ 11. The water-time system 



The data presented have been restricted to variables of four 

 dimensions: AW (water load), SW/At (rate of water exchange), 

 t (time), and 1/At (velocity quotient). Each variable appears in 

 diverse conditions, and continued care is necessary to limit the data 

 in any one comparison to those values obtained simultaneously or 

 under stated conditions. 



Correlations among these four variables taken two at a time are 

 of six types : 



AW vs. SW/At equilibration diagram (figs. 6, 11, 13) 



AW vs. t 

 AW vs. 1/At 



SW/Atvs.t 

 SW/Atvs.l/At 



1/At vs. t 



tolerance diagram (figs. 1, 5) 

 load-velocity diagram (fig. 17) 

 exchange diagram (fig. 2) 

 exchange-velocity diagram (not 



exemplified) 

 velocity diagram (fig. 19) 



+1 +2 ^3 



To+al Water Load 

 Fig. 20. Contour diagram interrelating rate of net water exchange (% of Bo/hour), 

 total water load (% of Bo), time (hours), and velocity quotient (1/hour). Dog. Heavy 

 lines represent sequelae of single ingestions of water by stomach, derived from figures 2 

 and 6 in positive loads, and from figure 10 in negative loads. Solid lines HHH' represent 

 the dogs maintained at various steady water loads, derived from figure 29 of section 13. 



