Tincture of Colchicum Seed now 0·04 gramme alkaloid in 100 c.c.
Fluidextract of Ipecac now 1·5 gramme alkaloids in 100 c.c.
Fluidextract of Stramonium now 0·25 gramme alkaloids in 100 c.c.
Extract of Stramonium now 1·0 per cent. alkaloids.
Tincture of Stramonium now 0·025 gramme alkaloids in 100 c.c.
Jalap Root now 7 per cent. of total resin.
Under the article Petrolatum, p. 336, U. S. P., last paragraph, the sulphuric acid test has been dropped.
February 15, 1907.
BOOK REVIEWS.
Elements of General Chemistry with Experiments. By John H. Long, M.S., Sc.D., Professor of Chemistry and Director of the Chemical Laboratories in the Northwestern University Medical School. Fourth edition, revised and enlarged. Illustrated. Philadelphia: P. Blakiston’s Son & Co., 1906.