KEl’OUT OF CIIEiMICAL LAHOKATOKY 
437 
The ash was 2-29 per cent, and the acidity was equivalent to 1-77 inilligrains of 
potassium hydroxide per gramme of the gum. 
The viscosity of the 20 per cent, solution could not be correctly measured for the 
reason stated above. 
Some small pieces of light-coloured gum picked from this sample were found to be 
quite soluble at first, but on standing the solution became of a granular consistence. 
ACACIA SUMA, Kurz. .1. campi/lacantha, Ilochst. 
This tree is known locally as Kakamut, or Sinein. A sample of gum from it was 
found to be completely soluble, but the solution had a mawkish disagreeable taste with 
a flavour of turpentine. All the gum was of dark colour :— 
Moisture.. ... ... ... ... ... ... 12-3*2 per cent. 
Acidity (milligrams KHO per gramme) ... .. 3-7U 
Ash 
*2* *25 per cent. 
Viscosity of 
20 per cent, 
solution 
{ Degrees of retardation 
Sugar equivalent (grammes 1 
per lUO c.c. of solution) J 
*20 
58-5 
ODINA PKUCTICOSA, Hochst. Amh, Leyun 
This gum was found to be completely soluble. The solution was yellow and the 
taste fairly good, but the viscosity of the solution was rather low. The results were as 
follows : — 
Moisture . 12-01 per cent. 
Ash . 2-40 ., „ 
Acidity (equivalent to milligrams KHO) . 1-92 
Viscosity of 
20 per cent, 
solution 
r Degrees of retardation 
I Sugar equivalent (grammes 1 
r, per 100 c.c. of solution) / 
27-5 
GO-8 
COMBRETUM, sp. (Tnfoliatiirii or Rartmainiiam) Arab, Subakh 
Several samples of this gum were examined. These varied greatly in appearance, the 
better ones being light amber in colour and in round and vermicular-shaped tears. An 
examination of such a sample gave the following results : — 
Moisture 
9-41 per cent. 
.\sh . 
•2-02 
-Acidity (equiv. to milligrams KHO) . 
.-3-34 
Viscosity of J Degrees of retard.ation . 
20 per cent. Sugar equivalent (grammes per 100 c.c. 1 
solution J of solution) J 
149 
09 
Colour of solution . . 
Light amber. Darkens on ex¬ 
posure and deposits a brown 
precipitate 
Taste . 
Practically tasteless 
Gum from 
Acacia suma, 
Kurz. 
Gum from 
Odin a 
fructicosa 
Subakh gum 
from Coinbn- 
turn, sp. 
