the magnitude cf the growth is also dependent on the constant 

 conditions. 



If we study this growth for any riven funpus for any 

 piven length of period, the quantities a and £ also become 

 constant so that G" = f (t, n) where G" denotes a growth ra 

 fungus t with tha giver, medium m, during a given length cf 

 pericd £, without radiation d. if we further study the growth 

 rate during a pericd with a given relation tc the moment of 

 inoculation, n also becomes constant so that G "{ = f (t) where 

 G"* denotes the average growth rate of fungus a with the given 

 medium, without radiation, during a given length cf pericd 

 when this period holds a given relation in time tc the initial 

 inoculation msment. 



If all the possible combinations cf these Eix quanti- 

 ties (a, k, _t, p_, d.and n were to he considered in a similar 

 manner it would require 64 different statements to express 

 the different relations. Considering two of them, (d, rc) 

 as always constant, (as was true for this study) and four of 

 them (a, t. , p, and n) as variables or constants as the case 



may he, the different relations could he represented by the 

 following 16 generalized statements three examples of which 

 have been given a")-ove. 



(1) 6 = constant, when d, jr., a, t, p, n, are constant. 



(2) G = f (a), when d, m, p, t, n, are constant. 



(3) § = f (t), »d,i, p,i, n, " 



(4) G = f (p), » d, m, a, t, n 



(5) G=f(n), " d, m, p, t. a 



