is. milk both,, on the external and internal surfaces of the woody 
growth, presumably because each is separately growing, and 
surrounded by the cambium and latex forming tissue. 
Yours truly, 
P. J. BURGESS. 
WIND TWIST. 
In positions where trees are subject to strong winds from one 
direction the trees take on an odd form which is known as wind 
twist. There are some very good examples in the Botanic Gardens. 
The trunk of the tree chiefly in old trees shews a series of spiral 
ribs usually rising from right to left. Some times the trunk is 
distinctly flattened in the direction facing the wind. Where the 
wind has had the greatest force the trees are very curious. There 
is a close series of transverse ridges with depressions between on the 
side facing the prevailing wind, from the bottom of the trunk to the 
top of the higher thick branches. This gives a most curious ladder- 
like appearance to the trunk. 
Trees like this are decidedly troublesome to tap as the cuts have 
to run up and down over the waves of bark and wood and it is 
difficult to get the latex to run just where it is wanted to flow. 
H. N. RIDLEY. 
MALAY DRUGS. 
Kelantan, 
September 1 6th, 1906. 
Dear Mr. RlDLEY, — Some time before his leaving Kelantan, Dr. 
GlMLETTE told me that you were thinking of revising your paper 
on “Malay Materia Medica,’’ and that he was trying to collect infor- 
mation which might he of use to you. As I had previously helped 
Dr. GlMLETTE in collecting notes on other subjects, 1 tried to do the 
same in this case; but unfortunately I had to move from Kota Bharu 
into the interior just about that time, and was only able to leave a 
list of diseases and their cures (abstracted from your paper) with a 
Malay friend and instruct him to question any available Toh Bomo 
concerning them. I have now' had a letter from him saying that he 
has questioned four or five Toh Bomo without success, as they did 
not recognise the name of the plants (nor, probably, the names of the 
diseases as translated by me), and enclosing two short lists of notes. 
I send you these lists, but 1 feel sure that they are really too slight 
to be of any use for your purpose. 
