INSECTS AND INSECTICIDES. 
mistakes, nor can it be as readily mixed as the forms just 
mentioned. 
We have had best success with Paris green, as it acts 
more promptly than London purple, and is less likely to 
brown the foliage of the plants treated with it. 
We use both mixed with water in the proportion of 
one pound of the poison to 100 gallons of water. If the 
solution be made too strong the foliage is injured, and it 
acts rather as a repellant to the insect. 
The exact quantity should be measured out and mixed 
with warm water into a paste; this is especially desirable 
for London purple, to secure proper diffusion with the 
liquid. 
These poisons should always be applied through a fine 
nozzle, and with force ; Paris green should especially be 
frequently agitated to keep the powder in suspension. 
Upon vegetables and fruit bearing trees and vines it is 
important to remember that it can be used with safety 
only very early in the season. 
As a remedy against foliage eating insects, it is sim¬ 
ply invaluable. 
The intelligent use of these forms of arsenic has ren¬ 
dered possible the cultivation of a wide range of useful 
plants, which otherwise would be impossible in the 
presence of the countless enemies of the plant growth of 
to-dav. 
«/ 
WHITE HELLEBORE. 
White hellebore is a vegetable poison. It is obtained 
from the powdered leaves and flowers of Veratrum alba. 
It is less dangerous as a poison than Paris green, but will 
without doubt cause death if inhaled in quantity. It is a 
specific against the currant worm when promptly applied, 
but is much less effective against other insects, and is 
best used in the dry, undiluted form. It should be kept 
in a closed vessel, and be applied with a bellows, thus 
bringing it in contact with all portions of the plant. 
