U4 
■.e advisable to give here the formula and method of preparation, 
i nto an earthenware vessel ,r ten pounds of fresh quicklime are placed, 
and three or four gallons of hot water added. The lime is allowed to 
slake for a short time and eight pounds of sulphur are added. 
The heat ol slaking of the lime should be sufficient to boil the 
mixture if the lime is fresh. The mixture is stirred and allowed to 
change to a yellowish brown colour, when it is made up with cold 
.vater to 50 gallons. The mixture is then strained through a sieve or 
piece of fine sacking, care being taken to work through the meshes 
any sulphur which remains over. The mixture is now ready for use 
and is applied by means of a spray. 
The above is the method of preparation of what is known as the 
self-boiled lime-sulphur mixture. Owing to the difficulty in obtain- 
fig good quicklime in this country it will scarcely be possible to 
prepare the self-boiled mixture. It will, therefore, be necessary to 
make the mixture up to 50 gallons using a zinc-lined* * " vessel and to 
boil it for half an hour over an open fire, when the necessary chemical 
reaction between the lime and suiphur will take place. 
The best sprayer for ordinary use in this country is the 
\ ermorel Eclair. These are stocked by the Borneo Company, 
Ltd., Singapore, and by Messrs. A. C. Harper & Co., Kuala Lumpur, 
Klang, etc. The price of each is about $25. An “Eclair’' sprayer 
can reach a height of ten feet, so that it can be readily used in young 
Rubber, Coffee, Camphor, etc. For the purpose of spraying older trees 
a more powerful machine is required. The “Eclair No. 3,” fitted 
with accessories, can reach a height of twenty feet. But it is advi- 
sable to have a more powerful sprayer and, for this purpose, a 
v ermorel “Cascade” sprayer has been ordered by the Department of 
Agriculture, and arrangements are being made to have it stocked in 
this country. It reaches a vertical height of forty-five feet. The 
reservoir of “Vermorel” Spraying machines is usually made of 
copper, but for use with reagents which react chemically with copper, 
■Mich as the lime-sulphur mixture above, tin-lined reservoirs are 
supplied. 
From what is known of the fungus at the present time it is very- 
improbable that the spread of the disease by spores occurs at all 
readily. The propagation of the fungus by means of the white 
mycelium alone requires consideration. For this reason the distance 
from which infection can spread by wind-blown mycelium is neces- 
sarily small. In view of this one might anticipate that only areas 
which are within a comparatively short distance of jungle are liable 
to be infected primarily. Repeated outbreaks of the disease in areas 
adjacent to the jungle will, therefore, necessitate the felling and 
burning of a portion of the adjacent jungle. 
* A Shanghai jar serves the purpose well. 
* ~ An old latex cart will do. 
