PARIS-GREEN. 
89 
green from settling at the bottom of the vessel, and, when it is sprayed, 
helps to secrete the preparation on the foliage.”* 
There is, however, so very much fear in first experiments of too 
strong a mixture being given that, though with care a larger proportion 
of “green” may serviceably be used, as will be seen in the following 
extract, the Committee did not undertake to recommend a stronger 
application :— 
For liquid application. —The amount recommended for spraying for 
Codlin Moth or young “looper” caterpillar is “not more than from 
2 to 4 ozs. in 40 (forty) gallons of water, or J to \ oz. in a pail of 
water (4 gallons, E. A. 0.), to be applied as a fine spray by means of a 
force-pump. The foliage must not be drenched, but the spray should 
only be allowed to fall upon the trees until it begins to drop from the 
leaves.” 
“ For general use on mature foliage. — \ lb. of Paris-green, 50 gallons 
of water. First mix the Paris-green separately with a small quantity 
of water, then add to it the whole supply. All washes containing 
Paris-green must be constantly stirred to keep it in suspension, or it 
will sink to the bottom.”! 
On these points Mr. Fletcher, the Dominion Entomologist of 
Canada, who greatly assisted us by his valuable advice, wrote to me 
enforcing care as to over-application :— 
“ Paris-green. —You are quite safe in recommending this; but 
insist upon these two things, viz. , 1st, to keep the mixture (which is a 
mixture, not a solution) well stirred all the time, and have the barrel 
well washed out after it has been filled ten or twelve times. The 
Paris-green is very heavy, and will keep sinking to the bottom unless 
constantly agitated, and as the barrel is frequently re-filled the residue 
will keep accumulating, until it will be too strong as the mixture 
reaches the bottom. 
“ 2ndly. The other point is to insist upon the mixture not being 
* The above observation by Mr. Masters is the only notice received of trial of 
mixture of flour with the “green.” This practice, however, is highly recommended 
by Prof. C. Y. Riley, Entomologist of the Department of Agriculture, U.S.A. In 
his ‘ Bulletin No. 3 of the United States Entomological Commission,’ Washington, 
1880, at p. 57 he mentions in observations on use of Paris-green in liquid sus¬ 
pension :—“ It pays to add two or three pounds of flour or starch to the mixture, 
not only from the greater adhesiveness which they give to the poison (a very desirable 
object, especially in wet weather), but because by their colour they help to indicate 
the quantity that has been distributed. In using flour it will be found advisable to 
mix it first in a bucketful of water, and allow it to remain until it sours, the object 
being to prevent it from forming lumps.” If any further experiment should be 
made with this admixture, I should be glad of notes as to whether the flour is in 
any way injurious by choking up the pores, or too thickly covering the leaves.— Ed. 
f ‘ Report of Entomologist, Central Experimental Farm, Department of Agri¬ 
culture, Canada,’ 1887, p. 21. 
