60 
PINE. 
be as much as the soft unripe shoots and foliage of the Pines could 
bear, and would, I have no doubt, kill the insect.” 
The application of Paris green was found to be so serviceable in 
checking attack of the Colorado Potato Beetle, when the Potato crop 
was threatened in North America, that its use has since been worked 
forward in detail, both as to the method and quantity, &c., by the 
U.S.A. State Entomologists; and I believe it might be so beneficially 
used in this country for many kinds of attack on leafage, that I give 
the following information from the observations on this subject in the 
‘ Annual Report of the State Entomologist for New York,’ issued 
October, 1883. 
The precise amount of Paris green which has often been applied 
without injury to many plants is a tablespoonful (that is, about an 
ounce and a half) in a pailful of water (that is, about four gallons). 
It is more safely applied by syringing than as a dry powder, as, 
being arsenite of copper, it is of a highly poisonous nature, and 
without great care the powder, in the dry state in which it may be 
inhaled, would be excessively prejudicial to the health of the operator. 
With regard to method of application, for a few plants it is stated 
“ no other appliances are needed than a small pail and a brush-broom. 
With the latter in the right hand the water at each dipping may be 
sufficiently stirred to hold the green in proper suspension, and the 
liquor shaken over the plants. When a larger amount of the liquid is 
necessary it may be applied with an ordinary watering-pot, provided 
with a more finely-perforated rose than that which commonly accom¬ 
panies it, which can be made by the tinman. The contents of the pot 
will require constant stirring with a stick to prevent the settlement of 
the poison.” 
For application on a still larger scale larger cans are used, which 
are so arranged that they can be strapped on the back. 
One of these is described as a “ can capable of holding about eight 
gallons of liquid, and so formed as to rest easily on the back, to which 
it is fastened knapsack-fashion by adjustable straps. To the lower 
part of the can are attached two rubber tubes, each furnished with a 
rose or sprinkler. The tubes are held respectively in the right or left 
hand of the bearer, and thus the fluid may be rapidly applied to a 
field crop.* For trees it may be applied by a force-pump (also by a 
garden-engine) with various adaptations.” 
The material is purchasable per ton in England under the name of 
“ Scheele’s Green.” It is procurable at 6d. a pound, with large 
reduction on taking a quantity. 
From the poisonous nature of this compound I would not take 
* See ‘First Annual Report on the Injurious and other Insects of the State of 
New York,’ by J. A. Lentner, State Entomologist. 
