J. Henderson Smith 



41 



Survivors 

 100 



Minutes 2 4 6 



Fig. 5. Phenol 0-7 per cent. 

 O O 9 day spores. X - - X 7 day spores. 



Survivors 

 100 



80 



60 



40 



20 



mm 



o « \ 



K I \. 



O \ I 



o ' 



I ° 'O— n- O 



Minutes 2 



8 



10 12 



Fig. 6. Phenol 0-7 per cent, and 6 day spores. 



The curve is drawn to the formula with A- = 0-226; the circles are the observed points. 



The crosses represent the logarithms (to base 10) of the observed number of survivors 



plotted against time. 



