Colonial Exhibition, 1886. 25 
makers. Mr. HOLMES of the Pharmaceutical Society 
found that it was readily soluble in Eucalyptus oil and 
formed an excellent varnish. In the solid state it is 
capable ot being worked up into an imitation of amber, 
and, mixed with that substance, becomes an admirable 
material for mouth-pieces of pipes, &c. 
Dr. SCHUCHARDT of Goerlitz informs me that he is 
engaged in chemical examination of our gums &c, and 
promises to communicate the results. Professor WAL- 
LACK is also investigating their composition. 
Karamanni also attra6led the attention which it de- 
served. Mr. BOLAS thinks it worthy of investigation. 
It is, according to Mr. im THURN, a compound of resin 
from a Hevea } bees-wax and powdered charcoal. A 
(t wax gutta," something like the Karamanni, was shewn 
by an exhibitor in the Sierra Leone Se6lion. 
COTTON, once one of the staple produfts of this colony, 
was but poorly represented at the Exhibition, as far as 
British Guiana was concerned. One of the samples 
shewn was, in the opinion of Mr. BUTTERWORTH 
(from whose report I quote), a Brazilian variety, retaining 
the features of that class of cotton in its harshness, — but 
well grown and of good staple. Another sample 
was evidently grown from Sea Island seed, and, if freer 
from leaf and dirt, would have been almost of a pure 
white. It had, however, one serious defe6l in irregularity 
in the length of staple, which is obje6led to by spinners, 
as it is difficult to manipulate. 
Although Mr. BUTTERWORTH reports that our 
colony has extensive trafts of land " adapted for 
" cotton growing, which, with the improved methods 
M of cultivation, sele&ion of seed and ginning, would 
D 
