INSECTS 211 



What the destructive action of paraffin on vegetable and 

 animal cells consists of, we do not exactly know, but it is probably 

 a reducing action, the paraffin abstracting oxygen from the 

 substance in the cells (VI, 123; cf. p. 161). 



Evidently there is much still to be learnt as to the nature of 

 insecticidal action. 



