38 
1. Alcohol precipitates the gum out of the solution without 
addition of caustic potash. Silicate of soda gelatinises 
the solution slowly. Melia composita, illd. a 
2. Alcohol precipitates the gum out of the watery solution 
only on addition of caustic potash. Silicate of soda : 
a not gelatinise the solution at all. Albizzia Toons, — 
ail 
b. Watery gum solution in a dilute state not gelatinising with 
ferric chloride but gelatinising with borax (if not too 
thin). ae 
1. Gum, precipitated by alcohol in a test-tube, is dissolved 
again in the alcohol on addition of 2-3 drops te 
chlorie acid. Flindersia maculosa, F. v. M.; Fh 
. Strzeleckiana, F. v. M. ttl 
2. Gum, precipitated by alcohol in a test-tube, is disso of 
again in the alcohol only on addition of 12-15 drops 
hydrochloric acid. Acacia dealbata, Link. . 
If. Gums insoluble or only partly soluble in cold water ; “ere ; 
a residue of metarabin (only swelled up) is left on the bottom of 
vesse . 
1. Gum insoluble and only swelling in cold water. eo 
ing j lourless jelly, looking 
3. 
. a 
Benth.; Sterculia quadrifida, R. Br. a 
2. Gum in the dry state looking like a dark gum: ar ' 
nalia Catappa, L. j 
2. Some of the gum soluble in cold water. : ai 
a. Solution even in a dilute state gelatinising quiet iit 
ferric chloride, but not gelatinised by borax. | : 
