380 M. C. Lea on Picric Acid. 
1 
one. The resemblance of the salts thus artificially colored to the 
norm 
The picric acid first obtained by Cahours from trinitranisol,t 
and by him picranisic acid, has been generally admitted 
po o. : 
_ The process for obtaining picric acid from commercial creosote 
is an advantageous one. The acid obtained is readily p ed 
r of experiments were made on the old process of 
ecomposing indigo with nitric acid with very various results, 
evaporation, a green picrate of ammonia deposited which exactly 
resembled that above described as obtained by the addition of 
