‘ 
1877. | 73 [Smith. 
through a small filter and after washing the silver iodide with alcohol, the 
filtrate was evaporated upon a water bath. When the liquid had almost 
approached dryness I observed minute oil globules of a dark color. 
The evaporating dish containing these was immediately removed from 
the water bath and stood in a cool place. In course of a few hours the oil 
solidified to a dark crystalline mass, which after pressing well between sheets 
of filter paper, I dissolved in alcohol and after concentration allowed to 
cool. Beautiful colorless needles separated from the solution. The fusing 
point was found to be 47°C. Again dissolved and allowed to crystallize the 
same form of crystals was obtained. The fusing point remained the same. 
Carbon and Hydrogen Estimation. 
(0.2072 Grm. well dried substance, burned with lead chromate gave .5418 
Grm. CO, 45.51 % carbon. And .0808 Grm. H,O = 4.30 % hydrogen. 
Calculated % Found % 
C, = 108 = 45.96 % 45.51 % 
Th = 98 = 3.40! G 4.30 % 
Cl,= 78 = 30.21 % 
48 = 20.42 % 
Cahours* obtained a similar compound by the action of chlorine upon 
ethyl-salicylate. Broad colorless, shining needles. Fusing point not given, 
Potassium ethyl-dichlorsalicylate. 
C, H, Cl, OK CO OC,H,. 
This salt was produced by boiling an alcoholic solution of the ether with 
potassium carbonate. It crystallizes in fine colorless needles, which fre- 
quently are united to bundles. Very soluble in alcohol. 
The points of difference between the compounds of Cahours, Rogers 
and myself are in brief these : 
The acid of Cahours is but slightly soluble in boiling water. Soluble in 
boiling alcohol, crystallizing from this in needles and octahedral crystals, 
and it forms also an insoluble nitro-derivative. 
The acid gotten by me is perfectly soluble in boiling water, and in cold 
alcohol—crystallizing from the former in arborescent masses and from the 
latter it separates in large coloriess needles. The nitro-derivative, if any, 
is exceedingly soluble. 
The acid of Rogers fuses at 224°C, is soluble in boiling water and boil- 
ing alcohol. The barium salt has five molecules of water and the copper 
salt is a green insoluble precipitate. 
The acid obtained by me fuses at 212°-214°C, its barium salt has but 
three and half molecules of water and the copper salt forms dark brown 
warty crystals, soluble in boiling water. 
#Annalen d. Chemie u. Phar. 73. 315, 
PROC. AMER. PHILOS. soc. xvit. 100. 5 
