481 
* 
293. Miscellaneous. Optional. 
1st prize. Hussain Bin Haji Ishak, Penang. 
(Fora model of cotton spinning apparatus.; 
Commended. Nain Lenggong, Negri Sembilan. 
Special prize. Tan Ong Pin, Kuala Lumpor. (For making 
tricks.) 
Special prize. H. B. Ellerton D. 0. (for implements collecting 
wood oil). 
PERSONAL. 
Mr. H. C. Pratt, the Government Entomologist, has been trans- 
ferred from the Institute for Medical Research to the staff of the Direct- 
or of Agriculture and will be engaged in the first instance in completing 
his investigations published last May in this Bulletin into the life 
history of Terrnes Gestroi, the white ant attacking living rubber trees. 
He will also carry on experiments in the direction of prevention and 
cure of this ubiquitous pest. 
GROWTH OF GTJTTA PERCHA. 
The Editor Agricultural Bulletin, 
Singapore. 
Dear Sir, 
In reference to Mr. Burn Murdoch s interesting article on the rate 
of growth of forest trees in the F. M. S. the following measurements of 
two Getah Tahan trees growing amongst my young Para trees may be 
of interest. The trees I may mention are situated on a gentle slope 
and have been practically clean weeded the whole time. Measurements 
taken 3ft. from the ground. 
18th 
January 
1906 
Tree No. 1. 
Hi" 
Tree No. 2. 
Ill" 
25th 
April 
1906 
141" 
Ilf" 
18th 
October 
1906 
151" 
121 
18th 
October 
1907 
17 " 
141" 
5th 
September 
1908 
18 " 
151" 
Therefore during 31 months the two trees have increased in girth 
41." an d 4i" respectively, or an average increase of about 1.65" per 
annum, against 1.69" of the lOOTaban trees at Taiping, referred to by 
Mr. Murdoch. 
In a year or two these two Tahan trees will be entirely shut in by 
Para trees, when there will be probably a falling off in the rate of growth, 
so far as girth is concerned. I shall continue my measurements. 
Yours Faithfully, 
G. A. L. 
