DIVEESE COMPONENTS 359 



man and Lehman '37), osmotic pressure (Wettendorff, '01), and 

 host of others, in dog; for radioactive sodium (Hamilton and Stone 

 '37), acid (Haldane, '21), and those shown in table 43, in man. 



(2) Eegains in various tissues after depletions. Plasma pro- 

 teins (H. P. Smith et al., '20; Stanbury et al., '36), hemoglobin 

 (Whipple et al., '25) and radioactive iron (Hahn et al., '38) in dog; 

 red blood corpuscles (Schiodt, '38) in man. Absorption of sodium 

 or of chloride through the body surface was found in frogs or 

 goldfish only in marked deficits of each separately (Krogh, '39). 

 That is the physiological equivalent of the equally specific ingestive 

 selection of sodium chloride from among other salts in solution by 

 adrenalectomized rats (Richter and Eckert, '38a). 



(3) Tolerance curves, whether named such or not, and absorp- 

 tions, penetrations, and accumulations. 



(4) ' ' Growth curves, ' ' which may be regarded as regains of size 

 from deficits. Each young individual is an incomplete or deficient 

 organism that constantly tends towards adult dimensions. The 

 farther from mature weight, the faster does growth usually occur, 

 within limits. All the equations that have been employed to repre- 

 sent the data of growth may thus be viewed as particular tolerance 

 curves, as instances of correlation between rate (growth) and load 

 (deficit of final size). No qualitative distinction is apparent be- 

 tween usual growth and the great gains of body weight that occur 

 after retardation by deficient diets or by privations of food (§ 118). 



(5) Adjustment of electrical polarization and other potential 

 differences in isolated muscle or nerve or skin, as after oxygen 

 privation; dark and light adaptation in the eye of man (Hecht et 

 al., '38) ; recovery of posture in man after being jostled; viscosity 

 of the interior of Ameha (Angerer, '36) ; shortening and lengthen- 

 ing in muscle after adequate stimulus. Partial data exist for 

 recoveries of body surface, acetone, epinephrine, lead, methyl 

 alcohol, sulfur, amino acids, and specific gravity. Every biologist 

 is familiar with many not named, even though he has come to asso- 

 ciate ''regulation" only with some restricted few components or 

 features of particular organisms. A study of any component may 

 be planned in analogy to those presented above, for all components 

 have loads and exchanges. 



<| 130. SUMMAEY 



The fact that none of the components mentioned failed to show 



