322 
The regulations governing the exhibition are the same 
as on previous occasions. Exhibitors desiring free trans- 
port bv Railway 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 
bv the Straits Steamship Co. on all bona-fide exhibits. A 
other reasonable expenses m connection with the tianspoit 
of exhibits will be considered by the Committee. 
Ed. 
EFFECT OF GALE ON A PARA-RITBBER 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 oi the tree, l ie 
side roots were verv 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 oi any 
kind were found. It appears that the ground on which tins 
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 lias resisted the violence of the gales There is 
no doubt that the tree has had a violent wrench m one oi 
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. 
Mr Peckliolt 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. He states that it 
forms a mat 6 centimetres thick on the surface of the water 
and so prevents the mosquitoes laying their eggs m the 
water and the larvae existing. 
