15. 



It will bo noted thnt the rata of ro.jene ration curves and the 



carbon Jiorlde curve sre not parallel. Thia, however, would not be expected 



em the normal carbon dioxide production is a straight line anl the nortavl rate 



of regeneration ia a curvs, progressing more siO#ly as regeneration neare 



completion. 



It le of interact to note that the curve of regeneration for the 



earlieet etage shorn (ZOf> of the amount removed) correspond! more nearly to the 

 curve of carbon dioxida production Vwn ioea the curve for t»v* second a tags 

 (30jf of the amount removed) and thle in turn sho*e more similarity than the 

 curve for the third state (33# of the amount removed). This would suggest 

 that at the vary beginning of tie process of regeneration the retardation of 

 regeneration correaponde With the acceleration of oxygen matabolism but that 

 later the two prooeeeea diverge progreesively, due to the additional inhibition 

 to regeneration afforded by the presence of the regenerated tiasue. 



Tablea 9 and 10, experiment five, give the carbon dioxide pro- 

 duction and regeneration of sr. other aerlea of tadpoles in KOH In this ease 

 the normal COg production of each set of tadpolea *ae first determine! an* used 

 as a basis for comparison of the C0 2 production under experimental con lit ions* 

 In graphing the CO^ production (Fig. 14) no. 6 was omitted as these tadpoles 

 had been injurod by accidental mixing of the Ba(OH)a used to absorb the COg 

 from the air above the water (Description of apparatus) with the water in which 

 the tadpolea were. 



Tablea 11 an! 1° give the results of a similar series of experiments 

 using Ca(0H)2 a* the base, and here again one set (So. 4) was spoilt* .1 by 

 accidental contamination of the solution with Ea(OH)£. Figures 13 and IS are 

 the ourvea of regeneration in KOH and CaOH raspactlvely; figures 14 and 16 

 shoa the rate of regeneration so time necessary t-> regenerate a given per cent 

 of the awount reeoved, and the C0„ production. While these curves are not 



