i 



CHEMISTRY AND THE MICROSCOPE 



authorities as resembling a whetstone. Viewed 

 from the side they have a striking similarity to small 

 sheaves of wheat. 



With the recognition of poisons under the micro- 

 scope we need not trouble ourselves here. It would 

 be useless to describe any of the experiments, for 

 few of us could obtain such deadly substances as 

 nicotine, strychnine, aconite, morphia and the like. 

 Nevertheless the recognition of these and similar 

 substances in very minute quantities is rendered 

 easy, to those who have the necessary knowledge, 

 by means of the microscope. 



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