414 PHYSIOLOGICAL REGULATIONS 



(d) In equilibration diagrams, the greater the difference in 

 rates of loading and of unloading, at any one load, the more is time 

 a correlative and the less is load a correlative, of the rates of 

 exchange. 



(e) Recovery in one component does not prevent recoveries 

 in others, though it may diminish their rates. Discharge of one 

 load does not often create large loads of another component. Were 

 any one component predominant it might easily be that all sorts of 

 disturbances (loads) would arise in an uncompromising restoration 

 of that component to zero load. Perhaps such easy compatibility 

 manifests niceties of coordination among the handlings of diverse 

 components. Conflicts may continually arise : obtaining water may 

 preclude cooling off, fleeing may inhibit excreting water, mobilizing 

 glucose may involve destroying water. The solution of those con- 

 flicts is the organization of the organism. 



Conceivably, interrelations are of two sorts. In one, Co is fixed 

 for all components ; that is the case in the data presented. In the 

 other, Co changes for one or more of the components. The diffi- 

 culties of distinguishing whether Co changes or not, lie in the effort 

 to define Co, not in the record of what happens. If it be said that 

 final content (Cj) after f hours is the criterion of recovery without 

 change in Co, then d = Co is the sign of it. If temporarily gain 

 equals loss at a content other than the original Co, then that is the 

 criterion that Co is not fixed. Such distinctions are required only 

 when words are to be used to summarize the relations among com- 

 ponents. 



(2) One question that has not yet been explicitly asked is : how 

 specific is the interrelation between the component that is loaded, 

 and the modification of exchanges of the very same component? 

 The only adequate answer is to be derived, I believe, by a correla- 

 tion of the following sort. Set down as abscissae all components 

 whose loads are to be tested, and set down as ordinates all com- 

 ponents whose modifications of exchanges are to be observed. See 

 what exchanges occur, and by how much each is modified, over a 

 wide range of loads of each component. To do this adequately, a 

 diagram showing net exchange of each y against load of each x is 

 constructed in each box of the chart. It turns out, for the com- 

 ponents listed in chapter XV, that exchange of no ' 'foreign" 

 component is modified as much as is the component that is under 

 increment. For a remarkably high proportion of components, con- 



