322 



The regulations governing the exhibition are the same 

 as on previous occasions. Exhibitors desiring free trans- 

 port by Bailway must give notice to a District Officer or the 

 General Secretary who will if they approve their exhibits, 

 provide them with numbered tickets and a free third class 

 pass on the railway for themselves and their exhibits. A 

 reduction of 25 per cent off the usual freight will be made 

 by the Straits Steamship Co. on all bona-fide exhibits. All 

 other reasonable expenses in connection with the transport 

 of exhibits will be considered by the Committee. 



Ed. 



EFFECT OF GALE ON A PARA-RUBBSR TREE. 



A correspondent sends in a letter on account of a Para- 

 rubber tree in which the tap root seemed to have lost its 

 bark which was regrowing, and on which were large lumps 

 of rubber. The tap root itself seemed sound and solid 

 though small in proportion to the size of the tree. The 

 side roots were very numerous and healthy. Some of the 

 side roots at a foot from the tree have broken up into a 

 tuft of smaller roots, rather suddenly as if the end had died 

 and the tree was trying to save itself by producing fresh 

 roots from the cut or dead end. The tree itself looked as 

 healthy as any in the block. No signs of disease of any 

 kind were found. It appears that the ground on which this 

 tree stands is liable to an annual gale and while other trees 

 in the block have been blown down or into a slanting posi- 

 tion, this has resisted the violence of the gales. There is 

 no doubt that the tree has had a violent wrench in one of 

 these gales and some of the side roots parted and probably 

 the tap root got cracked as well, so that the latex exuded 

 to repair the damage. The tree however had so strong 

 a hold in the ground by its anchor-roots that though some 

 broke the others held firm and the tree did not fall. 



Ed. 



AZOLLA, AS AN ANTI-MOSQUITO PLANT. 



Air. Peckholt in a German publication is quoted as 

 suggesting the use of this little water-plant to cover ponds 

 and so keep out the larvae of mosquitoes. Me states that it 

 forms a mat 6 centimetres thick on the surface of the water 

 and so prevents the mosquitoes laying their eggs in the 

 water and the larvae existing. 



