168 
Mims, J. C., reports 30 samples examined, 2 above, 28 below U. S. P. 
standard, the latter ranging from 1.15 to 6.66 per cent of gas. — Proc. 
Louisiana Pharrn. Ass., 1906, p. 62. 
Ehman, J. W., reports that S. E. Thorly compared the quality of 
ammonia water obtained from drug stores with that obtained from 
groceries and department stores, with the following results: Two 
drug store samples assayed 7.531 jier cent and 9.287 per cent ammonia 
gas; three from department stores, 3.236, 6.572, 12.8 per cent; three 
from groceries, 1.837, 2.025, 8.399 per cent. The department store 
sample, assaying 12.8, was found to be the only one containing more 
than traces of impurities, such as solid residue on evaporation and 
carbonate. — Am. J. Pharm., Phila., 1906, v. 78, p. 116. 
Wiebelitz, H., asserts that in view of the fact that ammonia water 
is frequently used to neutralize acids and acid salts, in the test for 
heavy metals it should itself be absolutely free from such contamina- 
tions. — Pharm. Ztg., Berl., 1906, v. 51, p. 1001. 
Buisson, A., (Compt. Rend. Acad. Sci. [Par.], 113, 1906, No. 5, 
pp. 289-291 ; abs. in Bui. Soc. Chim. Par., 3. ser., 35, 1906, No. 21, 
p. 1320) reports on the determination of ammonia in water by Ness- 
ler’s reagent. — Exper. Sta. Rec., 1906, v. 18, p. 609. . 
AQUA AMMONIJE FORTIOR. 
Baird, J. W., reports that of eleven samples of stronger ammonia 
water examined in 1901 nine were found to be adulterated. — Proc. 
Massachusetts Pharm. Ass., 1906, p. 58. 
The Ph. Brit. Committee of Reference in Pharmacy report on 
liquor ammonise fort is says : 
The official sp. gr. 0.891 corresponds to 31.5 per cent NH 3 instead of 32.5 per- 
cent. Sulphuric acid should be substituted for hydrochloric acid in the test for 
“ tarry matters.” Absence of residue after evaporation and ignition would be a 
useful test. — Chem. & Drug., Loud., 1906, v. 69, p. 864. 
AQUA HYDROGfEUII DIOXIDI. 
La Wall, Charles H., calls attention to a strong odor resembling 
nitrobenzol in several samples of hydrogen peroxide solution. Upon 
investigation he found this to be due to the addition of acetanilide as 
a preservative. In the freshly made and odorless product this can be 
detected by shaking out about 25 c. c. of the solution with a few c. c. 
of chloroform, evaporating to dryness and applying the isonitrile test 
for the presence of acetanilide. — Am. J. Pharm., Phila., 1906, v. 78, 
p. 582. 
An abstract from a patent granted to W. Heinsich would indicate 
that a weak aqueous solution of hydrogen peroxide can be preserved 
by the addition of small quantities of organic compounds, all of which 
