Rite, 
a ipreseribed: it one cae gone too far here and iiere: eg. as regard: 
for some oils, it is St understandable and Rou ap to corro 
without taking it ecnemmice into consideritane. | 
It is remarkable that the index of refraction has not been eee 
ducts, as it there contributes considerably to characterize them and. Ww 
have been quite in its place. We are going to mention. in all such cases the 
fora temperature of 20°. , 7 Shee ee Pau 
hitherto, in the first instance referring to water of 25°. The inaltcarione | 
index of refraction are valid for a temperature of 20°. 
There are various chanees rt to be. recorded with fegard to the several 2 
aiz., the oils of copaiba, caaetuel hedeoma, rose and sage, Givale: and cinnamaldehyde 
Oleum cethereum is likewise not mentioned any more in the U. S. Ph: Eg oske ot 
After these introductory remarks, we now proceed to the discussion ot pat sulars. 
Oil of Anise, Oil of Star Anise (Oleum Anisi). — Both Ardiniane anise aaa Stee 
anise oils are official, but the botanical source must be stated on the label. -Colourless 
or pale yellow; dé 0978 to 0.988; Ano50-+ 1 to nee Npz00 1 O44 to 1.560; Sone 
Tests for neutral ecm tide, for hens and heavy ‘metals. 
_a slight cloudiness. 
Benzaldehyde (Benzaldehydum). — Produced synthetically or obtained hee 
of bitter almond and containing not less than 85 per cent. of pare benzaldehy 
assayed by the phenylhydrazine method. Colourless or yellowish; lee about 1 04 
slightly soluble in water, miscible with alcohol, ether, or fixed or volatile oils. Tests 
for absence of hydrocyanic acid, chlorinated products (Beilstein’ s test), and nitro! 2nzene. 
4 
We miss here a statement concerning the refractive index, which at 20° is between 1.544 and’ 546; 
compare introduction. It also might have been mentioned that benzaldehyde is optically inactive, as ‘ 
Oil of Bitter Almond (Oleum Amygdale amare). — Yield not less than 85; pe : 
of benzaldehyde (phenylhydrazine method). Hydrocyanic acid content, 2 to 4 pe ce 
Clear, colourless or yellow; ds 1.038 to 1.0604); C Marek ke) dextrorotatory, not ex eed 
+ 0°10’; npso0 1.5428 to 1.5439; slightly soluble in water, soluble in all ‘Ope 
in alcohol or ether, as well as in 2 vols. of 70 per cent. alcohol. When first re 
neutral to litmus paper, but developing afterwards acid reaction due. to the 
of benzoic acid. Oils showing crystals of this acid must not be dispensed. i 
absence of heavy metals, chlorinated products, and nitrobenzene. _ Cheat 
1) We, would consider an upper limit of 1.063 more appropriate, ng a) % 
Oil of Cajuput Kasay Cajuputi). — Colourless or sales 
heavy metals‘). ee 2 
1) This test, as well as the requirements as to the Beto Soa that the 7 
medicinal use, since the crude oil is ecane e bluish green. ova to. the ‘presene 
. 
