

relations of the two processes are alike ; they have the eanp 

 temperature minima, optima ard rax i ma and the two rates c^arp-e 

 from one temperature to another in just the same way. If the 

 two graphs fail to coincide throughout, the two rate-temperature 

 relations differ, and just how they differ is apparent from an 

 inspection of the rraphs. From any suc>. graph, constructed 

 from adequate experimental data, may >e derived the temperature 

 minimum and maximum aid also the temperature optimum or optimal 

 temperature ranre. Furthermore, the different values of the 

 temperature coefficient for the same process, etc., may readily 

 he compared fcr different temperatures, and the coefficient 

 values for different processes may he compared for the sa-r.e 

 temperatures. Home of the points hroutrht out by inspection 

 of the prcup of four coefficient-temperature graphs s v owr. in 



figure 11, have been mentioned, hut many others not 'rare con- 

 sidered may he noted. 



The four p-raphs thus far considered show the relation 

 of temperature coefficients tc temperature for the four fungi 

 dealt with ir this paper and for the second 24-hour period after 

 inoculation. The four coefficient p-raphs fcr Pythiacyetis for 

 the first, second, third, and fourth 24-hcur periods after inoc- 

 ulation ars also shown (figure IS) • These rraphs are construct- 

 ed from the data riven in tahles XII] in t^e manner employed 

 for fipure l^r , they have not been smoothed. j graph for 

 each successive period after the fi v 'et lies below the one for 

 the preceding period. The progressive lowering (alrea>. 

 tioned) of minimum, maximum and optimum temperature with the 

 successive periods is clearly shown and it is well brought out 



P. 7 



