418 Scientific Intelligence. 
ments with it as regards i properties. 
Dinitraniline pal bilitvaniitne is obtained by tei = preg 
nyle citraconamide by means of carbonate of soda. When pure, it 
crystallizes in yellow tables, It dissolves very sparingly in water, produ- 
cing a yellow liquid. It has the formula C,H s(NO,)N,. It does not 
— with acids or sti pm it appears to be more soluble in 
in appearance to chromic acid. It dissolves in water, —— a peor 
or orange-colored solution like that of bichromate of potassa. Alco hol 
I mentio 
diamine has been spoken of as having properties similar to those of fuch- 
carbolic acid on the large scale, in the following manner, with su ne 
As strong nitric acid acts very violently when brought in contact wit 
carbolic acid, I have found it best to use an acid ei a gravity less 
vat and at the same time be converted no nitro, - ed. 
acid, and consequently diminish the quantity of nitric aci 
its poenfec ae When reparing picric acid from car rbolic acid, there 
is always a quantity of yellow, resinous matter roduced, 
considerable quantity of oxalic acid. The latter is always produce 
the acid which is used to finally convert the carbolic acid is too a a 
then it rapidly decomposes the picric acid, yielding carbonic - eer 
acid. Picric acid, when pure and dry, is of a light aheop re on sitet 
erystallizing in strongly shining lamine. It possesses an een he di- 
taste, and es in water with a beautiful yellow lent phous 
gested with protoxyd of iron in the cold, it yields a brown ce 
compound, which dissolves in water with a blood-red color. . crate = * 
copper is a yar yello: oc Ma color when in solution. 
