518 
for instance, in white ointments only the whitest oxide will prove sat- 
isfactory. Tests show that arsenic is frequently a constituent of the 
commercial grades. — Bull. Pharm., Detroit, 1906. v. 20, p. 232. 
Vanderkleed, Charles E., points out that zinc oxide should be 
watched for undue amounts of chloride, which might prove to be 
irritating in ointments. — Proe. Pennsylvania Pharm. Ass., 1906. 
p. 121. 
Patch. E. L., asserts that American samples of zinc oxide average 
99.05 per cent ZnO, but frequently contain traces of iron and chlo- 
ride. — Proc. Am. Pharm. Ass., 1906, v. 51, p. 317. 
Caspari, Chas. E., reports 3 samples of zinc oxide examined: 2 
U. S. P., 1 contained chloride. — Proc. Missouri Pharm. Ass., 1906. 
p. 100. 
ZINCI PHENOLSULPHONAS. 
The Ph. Brit. Committee of Deference in Pharmacy report on zinci 
sulphocarbolas says the method of manufacture would not yield a 
pure product. The salt contains eight molecules of water of crystali- 
zation, not one, as given in the Ph. Brit. — Chem. & Drug., Lond.. 
1906, v. 69, p. 865. 
Caspari, Chas. E., reports 6 samples of zinc phenolsulphonate ex- 
amined — 2 U. S. P. ; 3 contained arsenic ; 1 metallic impurities. — 
Proc. Missouri Pharm. Ass. 1906, p. 99. 
Felter, Harvey IVickes. gives as the indications formulated by the 
Eclectic observers from their experience with zinc sulphocarbolate ; 
tongue pallid, moist, pasty and dirty (Thomas) ; intestinal sepsis, 
with copious foul-smelling alvine discharges; tympanites; septic 
fever and haemorrhage in typhoid fever, and other septic bowel dis- 
orders. (American Dispensatory.) — Eclectic Med. J., Cincin., 1906, 
v. 66, p. 191. 
ZINCI SULPHAS. 
Ohliger. Millard, reports zinc sulphate containing excess of chlo- 
rides and free acid. — Proc. Michigan Pharm. Ass., 1906, p. 18. 
ZINGIBER. 
Naylor, TT. A. H.. reviews the chemistry of ginger and concludes that 
for a more complete and much-needed valuation of ginger for pharma- 
ceutical purposes a process is required that will be sufficiently accurate 
and easy of execution by the pharmacist for the separation of the 
volatile oil and oino-erol free from the fattv and resinous substances 
that accompany them in the oleoresin. — Yearbook of Pharmacy, 
1906. pp. 211-213; also Pharm. J.. Lond., 1906, v. 23, p. 75. 
