7 o 
have a capacity up to 50 gallons and can easily be pushed from 
place to place. Shrubs and small trees can conveniently be spray- 
ed with an ordinary length of hose and a metal extension pipe 
allows for treating taller trees. There are several good machines 
obtainable, especially in the United States. Those most in use in 
the West Indies at the present time, are manufactured by the 
Deming Company, Salem, Ohio, and by the Gould’s Manufacturing 
Company, 16, Murray Street, New York. The “ Success ” knap- 
sack spraying machine made by the former company and the 
“Fruitall” spraying machine made by the latter may be seen at 
the Botanic Station and are thoroughly reliable. The following 
can be obtained from Peter Henderson & Co., 35, Cortlandt Street, 
New York. 
“ Success ” Knapsack Sprayer ... $11.00 
“Henderson” Garden Spray Outfit 6.00 
“Henderson” Hand Bucket Pump 3.75 
“ Fruitall ” Spray Outfit “ A ” .. 10.00 
“ Gem ” ,, ,, . “ A ” ... 5.00 
“Pomona” „ ,, “A” ... 13.50 
“Sentinel” ,, ,, “A” ... 34.00 
The “Fruitall”, “Gem”, and “ Pomona ” have to be fitted into the 
end of a barrel similar to that imported into the West Indies with 
cooking oil, usually blue outside. This barrel can then be mounted 
on Henderson’s water-barrel truck (costing $11.00), and the whole 
forms a very convenient and powerful machine. The “Sentinel” 
is a more powerful pump, and has to be fitted on a cart, with a 
barrel to supply the wash. It works two nozzles at once. 
The “ Henderson ” hand bucket pump fits any bucket or small 
tub and is adapted only for treating small plants, ferns, etc. The 
“ Henderson ; ' garden spray outfit is a more complete arrangement 
of the same machine. There are many more outfits for spraying 
plants, but the above list will enable any one to provide himself 
with a reliable machine. When ordering it is necessary to specify 
the “ Bordeaux” or “ Seneca” nozzle, which appear to be the best. 
Powders are applied by dusting them over the plant. This may 
be done with a tin can perforated with small holes, or by placing 
the powder in a coarse sack and beating it. Special appliances 
for blowing powder are found very useful in applying Paris Green, 
sulphur, or other finely powdered poisions. The “ Little giant 
powder gun M is one of many forms sold by dealers in gardening 
implements, and may be obtained from P. Henderson & Co. 35, 
Cortlandt Street, New York, for $ 5 -°°* complete. 
Thoroughness in application is absolutely essential to success. 
Next in importance is observation of the results and repetition 
when necessary. One dose is often sufficient, but,- for scale insects, 
more applications are required. The first dose will destroy the 
mature scale insects but not their eggs and a second or third dose, 
at intervals of about a week, are usually necessary. 
Other Remedies. 
Trees may often be preserved from the attacks of boring insects 
