52 
tical. both names are used in the U. S. Pharmacopoeia. Eighth Decen- 
nial Revision, as separate headings, because most people are familiar 
with the name Hvoseine but not with Scopolamine. Scopolamine is 
formed by the union of tropic acid with scopoline. a compound similar 
to tropine. (See Homatropine . \ 
In the British Pharmacopceia Scopolamine Hydrobromide is used as a 
synonym for Hvoseine Hydrobromide: in the German Pharmacopceia 
only the name Scopolaminum hydrobromicum is retained. 
Dose.— “ Average dose: <v"<X>5 Gm. = M5 milligra mm e grain*.” 
(T. S. P.) 
SERUM AXTIDIPHTHERICI73L 
Antidiplitlieric Serum. 
Diphtheria Antitoxin. 
“A fluid separated from the coagulated blood of a horse immunized 
through the inoculation of diphtheric toxin.” — U. S. Pharmacopceia. 
The German Pharmacopceia recognizes also the dried serum. 
Antidiphtheric serum gradually loses its power, the loss in one year 
varying between 10 and 30 per cent. 
“The standard of strength, expressed in units of antitoxic power, 
should be that approved or established by the U. S. Public Health 
and Marine-Hospital Service." ( G. S. P. * All manufacturers selling 
diphtheria antitoxin in the District of Columbia, or in States other 
than the one in which it is manufactured, must secure a license issued 
by the Secretary of the Treasury on recommendation of the Surgeon- 
General of the Public Health and .Marine-Hospital Service. (E or a full 
discussion of the official standard, ^ee Posenau. ML J. : The immunity 
unit for standardizing diphtheria antitoxin. Bulletin Mo. 21. Hygienic 
Laboratory. 17. S. Public Health and Marine-Hospital Service. 1905.) 
Dose. — “Average dose: 3.000 units. Immunizing dose for well 
persons: 500 units." (L . S. P. * 
Caution. — Should be kept in sealed glass containers in a dark place 
at temperatures between T.5 3 and 15- C. GO 3 and 59 3 F.). 
SODII A R SEX AS EXSICCATES. 
Exsiccated Sodium Arsenate. 
Xa«HAs(X 
This is the same as the Sodii Arsenas of the British Pharmacopceia: 
also known as anhydrous sodium arsenate. 
Properties. — An amorphous, odorless, white powder. Permanent in 
dry air. Soluble in 3 parts of water: very soluble in boiling water. 
This is prepared from Sodium Arsenate already official) by expel- 
ling bv heat tlfe <even molecules of water of the latter. The hvdrous 
C i. *• 
sodium arsenate ( Sodii Arsenas. 1. S. P. » is efflorescent in dry air 
