S. Sodium carbonate dissolves none or a very small quantity.
i. Petroleum-spirit extract colourless. Chloral test produces no colour or a very faint grcenish—Bombay Mastic.
Petroleum extmet colonred.
ii. Dark-brown. Chloral test colours brown—Mani Resin.
iii. Yellow-brown. Chloral test colours gradually indistinct red-violet—Carana Resin.
iv. Yellow-hrown. Chloral test and bromine solution colour a magnificent violet—Carana hedionda.
b. Lead acetate gives with the alcoholic solution a preeipitate that dissolves on boiling. (Z. Bromine solution colours red—Perucian Guaiaeum.
f3. Bromine solution produces no coloration—Alexandrian Mastic.
c. Lead acetate gives no precipitate. Ammonia gives a turbid mixture—Dragon's-blood. rt. Imperfectly soluble in alcohol.
1. Lead acetate produces turbidity which disappears upon warming—)3razilian Copaibi.
2. Lead acetate gives no precipitate. The drug is clearly crystalline. Sodiutn carbonate doos not dissolve it by boiling.
a. Bromine solution gradually colours green.
i. Alcoholic hydrochloric acid colours violet, blue, or brown—Elemi.
b. Bromine solution colours violet--Elemi.
c. Bromino solution produces no colour—Elemi (Amyris elemifera).
Imperfectly soluble in Ether.
A. Perfectly soluble in alcohol.
1. Sulphuric acid colours the evaporation-residue of a petroleum-spirit oxtract cherry-rod. Tho drug is free from cinnamic acid—Siam Benzoin.
xi. Sulphuric acid does not colour auch residue, or only faintly light-brown. Contains cinnamic acid—Sumatra Benzoin or Tolu Balsam.
Sulphurio acid colours such residue yellow-brown passing into violet—Blach Peru Balsam.
B. Imperfectly soluble in aloohol.
z. Perchloride of iron gives a precipitate, which is neither dissolved by boiling nor soluble in ether—Brazilian Copal.
Perohloride of iron produces no turbidity or only a slight one that disappears on boiling.
1. The ethereeus solution gives with alcohol a turbid mixture.
w. Alcoholic hydrochloric acid colours it brownish. Chloral test colours evaporation-residue of petroleum-spirit extract greenish—Dammar.
b. Alcoholic hydrochlorio acid colours it brick-red. Chloral test colours the petroleum spirit residue carmiue-red to violet— 117iite Peru Balsam.
2. Ethereous solution gives with alcohol a dear mixture.
a. Ammonia gives with alcoholic solution a clear mixture. Bromine solution colours blue —Ceradia Resin.
b. Ammonia gives with the alcoholic solution a turbid mixture. Bromine solution colours greenish—Mecca Balsam.
Imperfectly Soluble or Insoluble in Chloroform.
Completely soluble in Ether.
A. Ethereons solution red. Ammonia gives with alcoholic solution a dear mixture—Dragon's-blood from Pterocarpus Draeo.
B. Ethereous solution yellowish or colourless.
1. Alcoholic solution gives with lead acetate no precipitate--Podocarpus Resin.
H. Alcoholic solution gives with lead acetate a precipitate that is not dissolved by boiling— Sandarach.
Imperfectly soluble in Ether.
A. Ethereous solution becomes turbid after addition of alcohol.
Aleoholio solution gives with ammonia a clear mixture.
1. The mixture with ammonia is yellow. The solution of the resin in sulphuric acid is yellow brown and gives with alcohol a clear violet mixture—Eryops Resin.
2. The mixture with ammonia ia carmine-red—Sonora Lac.
u. Alcoholic solution gives with ammonia a turbid mixture.
1. Perchloride of iron colours green. The drug contains cinnamic acid. Lead acetate gives a precipitate—Liguid Storax.
2. Perchlorido of iron colours brownish or not at all.
a. The drug contdins cinnamic acid, aud gives with lead acetate no precipitate—Liquidambar Balsam.
b. The drug contains no cinnamic acid, and gives with lead acetate a precipitate—Eu phorbia Tirucalli Resin.
B. Ethereous solution gives with alcohol a clear mixture.
r. Perfectly soluble in alcohol. Perchloride of irou colours dark-brown or black.
1. Solution iu alcohol is red.
a. Lead acetate gives no precipitate. Chloroform extract colourless—Xanthorrhcea quad ranjui(ris Resin.
b. Lead acetate produces turbidity. Chloroform extract yellow—Iantiorrhcea arborea _Resin.