profits are excellent. The growth of the trees at the experiraer 

 station is most encouraging and compares very fayourahlv wit 

 the same age trees in Ceylon even at higher elevations, which ar 

 supposed to be more suitable for camphor cultivation, some 30 

 trees at the Experiment Plantations, Batu Tiga, growing only 

 f<-w feet above sea-level, have attained in two wars a la ight nf'i 

 to 14 feet. 



Eradication of Lalaxg. 



The experiments with spraying to the eradicate lalang wer 

 continued during the year. The use of arsenite of soda wa 

 found to be effective if properly applied. 



The want of efficient spraying machines at present prevent 

 the general trial of this cheap" method of killing out lalang am 

 other persistent weeds. In addition the prohibitive local cost 

 500-800 percent, more than retail pri< . s in Europt of the arseiu 

 and the soda, make the cost per acre too high to pay. Arrange 

 '^ntslmv, mm been mad t„, ble rates fron 



Calcutta With the cost of the materials not much more thai 

 the retail price in England, and an efficient machine whicl 

 gives a fine spray, the total cost per sprav should be under 81.5c 

 |7' :i <Tc: three or f,,ur spravs is enough to entireh kill tin 

 MUn - * " damage is done to' the roots of plants growing in th. 

 s; " m ' * T,)und ' the s pray being only a leaf poison. 



Rubber Cultivation at Various Elevations. 

 The rubber trees at the Experiment Station, Gunong Ansi, 



uh;l eai "' and takes & rear interest in the progress of the plots, 

 , ' C l Ue S,tUate , , at re S ul ar distances from sea-level to 2,400 t. 



at the dispiK 



the Botanica 

 systematic be 

 ting Aroidaj. 



