299 
Bell. J. Carter, believes that the limit of water in glycerin might, 
with advantage, be stated. And prosecutions instituted whenever 
necessary for “ extraneous water.” — Brit, & Col. Drug., Bond., 1906, 
v. 49, p. 549. 
Schmatolla, A., discusses the tests proposed for the valuation of 
glycerin. He points out that freedom from odor is indicative of 
purity, but that this test is not applicable to small samples, but must 
be confined to large quantities, carboys, or drums. Indifference to 
litmus paper does not indicate the neutrality of glycerin. The silver 
test he believes to be reliable, — Pharm. Ztg., Berl., 1906, v. 51, p. 363. 
Galimard and Yerdier call attention to the presence of arsenic in so- 
called pure glycerins in the form of compounds not directly detect- 
able by the Marsh apparatus, and suggest a modification of the 
method.— J. de pharm. et de chim., Par., 1906, v. 23, p. 183. 
G. Hell & Co., in Troppau, found the specific gravity of samples of 
glycerin to vary from 1.125 to 1.254, two samples contained free fatty 
acids. — Pharm. Post, Wien, 1906, v. 39, p. 181. 
Dieterich. Karl, reports on 17 samples of glycerin. The specific 
gravity varies from 1.2293 to 1.2340 at 15° C. Of two samples that 
were refused one contained heavy metals and the other had a specific 
gravity of 1.2209 at 15° C. — Helfenberger Annalen 1905, 1906, v. 18, 
p. 82. 
Barnard, H. E., reports that of 61 samples of glycerin analyzed, 
47, or 77 per cent, did not conform with the U. S. P. VIII require- 
ments; in no case was there evidence of fraud, but the large number 
of samples of inferior quality indicate that the trade uses little care 
in purchasing this article. — Rep. Indiana Bd. Health, 1906, pp. 369, 
370. 
Kebler, Lyman F., reports that 15 samples of glycerin tested com- 
plied with, the U. S. P. requirements excepting the volatile fatty acid 
test. Only three of the samples were free from this impurity. All 
were virtually free from arsenic. — Proc. Am. Pharm. Ass., 1906, 
v. 54, p. 348. 
Ohliger, Willard, reports glycerin containing traces of butyric acid, 
mineral impurities and sugars. — Proc. Michigan Pharm. Ass., 1906, 
p. 47. 
Baird, J. W., reports 93 samples examined in 1904, 5 adulterated. — 
Proc. Massachusetts Pharm. Ass., 1906, p. 59. 
Thurston found glycerin generally up to standard ; only one sample 
tested was low in specific gravity. — Proc. Ohio Pharm. Ass., 1906, 
p. 69. 
Smith, Kline & French Co. report on the examination of 7 samples 
of glycerin, the average sp. gr. of which was 1.25 at 25° C. They 
point out but one fault in these samples, a distinct trace of arsenic by 
