représentée! and under them the corresponding growth- 

 curves. The inversion-points of the growth-curves lie on 

 the average one hour later than those of the temperature- 

 curves: which proves, that during the first hour of rising 

 température growth proceeded still under the influence of 

 the preceeding fall of température. 



The investigators who occupied themselves with B 1 a c k- 

 m a n's theory afford us further instances. Miss M a 1 1 h a e i ') 

 after heating the expérimental leaves up to the desired 

 température had to wait one hour and a half before she 

 could start her experiments. Blackman*) mentioning 

 this fact adds: ..Hardly any investigators hâve allowed a 

 shorter preliminary time." Van Iterson and Miss 

 van Amstel^ investigating the alcoholic fermentation 

 had to wait until 25 to 30 oc. gas had escaped, before 

 thegas-production (at températures which were not harmful) 

 became sufiBciently regular. 



My best argument I find in Kuyper's investigation. 

 Kuyper*) had to wait about one hour at 25° C. and at 

 30° C. before he could make his first observation of the 

 respiration, because otherwise the CO? production was 

 very small. He adds and I emphasize thèse words : 

 „evidently the COî-pvoduction is not at once at the height 

 corresponding with the degree of warming." And discus- 

 sing his results Kuyper says a propos of his results 

 between 30° C. and 40° C. ^) : „In my opinion we hâve 

 hère two processes combined. which together are the 

 <;auses of the COï-production in normal respiration. One 



1 ) G. L. C. M a 1 1 h a c i, 1905, p. 62. 



2) F. F. B 1 a c k m a n, 1905, p. 286. 



3) G. va n 1 1 c r s n Jr. and Miss J. v a n A m s t c 1, 19l<i, p. lO'J. 



4) J. Kuyper, 1910, p. 170. 



5) J. K u y p e r, 1910, p. 206. 



