CHEMICAL MICROSCOPY 



(a) 



(b) 



(c) 

 Fig. 1. Opium, (a) Indian; (b) Turkish; (c) Afghanistan. 



course, is not sufficient by itself to prove a 

 particular origin, but in conjunction with 

 various chemical assays and ash analysis it 

 is very useful. After years of study, it is 

 still the easiest origin test to make, and at 

 the same time one of the best. 



Charles C. Fulton 



PURPOSE 



A fundamental error, which seems to be 

 prevalent in modern "microchemistry", is 

 the idea that the microscope has value in 

 chemistry only as an adjunct to procedures 

 on a small scale. Actually this is the least of 

 its uses; and the early chemists, say from 



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