100 
IOWA ACADEMY OF SCIENCES. 
trated as e. g., the barium salt. When the acid is dis- 
solved in a solution of sodium, potassium or ammonium 
hydroxide a deep yellow colored solution is obtained. 
Silver-2 nitro-4'-phenyl ether carbonate AgQOC.- 
C.H 4 OCJH 4 .M|| The silver salt was prepared by dissolv- 
ing a portion of the acid in dilute ammonium hydroxide, 
evaporating off the excess of ammonia and precipitating 
with silver nitrate. It separates out in pinkish curdy 
lumps. It is sufficiently soluble in water to yield a slight 
turbidity when hydrochloric acid is added to the solution. 
When pure and dry it is very stable and is not decomposed 
by direct sunlight, even when exposed for several hours. 
It is insoluble in inorganic solvents in general, and melts 
wdtli decomposition at about 220° C. One part of the salt 
is soluble in 2180 parts of water at ordinary room tempera- 
ture. 
Barium-2-nitro-4 -phenyl ether carbonate Ba [OO.C 8 - 
H 4 OC 6 H 4 . NO s ]-h l|H a O. The barium salt was prepared 
by adding a little more than the theoretical quantity of 
barium hydroxide to a strong water solution of the ammo- 
nium salt obtained as given above in the manufacture of 
the silver salt. The excess of barium was precipitated 
from the solution by passing in a stream of carbon diox- 
ide. The salt crystallizes out from a hot water solution on 
cooling in pearly flesh-pink scales. One part of the salt 
dissolves in 122 parts of boiling water and in 948 parts of 
cold water. Before making an analysis it was dried over 
sulphuric acid for several days and then dried in the air 
bath for three or four hours at 100-110° C. Between 
80 and 100 degrees it took on a much deeper hue, which 
seemed to be permanent and lost water corresponding to 
If molecules. Two analyses resulted as follows: 
Calculated for Ba(Ci3HsN Osja+l^EkO. I If 
Barium 19.37 per cent 19.32 per cent. 19.03 per cent- 
Loss of water 7 64 7.35 7.0S 
2-amido-4 -methyl phenyl three H 2 N.C 6 H 4 OC 6 H 4 .CH 3 
The amido ether was prepared by dissolving the previ- 
ously described phenyl ether in alcohol and water and reduc- 
ing with tin and hydrochloric acid while warming on the 
