25 
NOTES ON FUNGICIDES AND A NEW SPRAYING PUMP. 
By B. T. Galloway. 
In connection with the papers found elsewhere in the Journal, it 
would seem proper to say something in regard to the preparation of 
fungicides, particularly those recommended for use. The manner of 
preparing most of these, however, has been so fully described in former 
publications that we deem it unnecessary to repeat the descriptions 
here. We will say, in passing, that the circulars—Nos. 5 and 6 of the 
Section of Vegetable Pathology—containing this information will be 
forwarded to all those desiring to consult them. 
Aside from the old and well established preventives and remedies, 
there are several new ones which we think it would be well to call at¬ 
tention to in order that they may be more fully tested. The first of 
these is a solution of copper acetate or verdigris, which was mentioned 
in Volume 5, Number IV, of the Journal. It is prepared as follows: 
Dissolve 3 pounds of powdered verdigris in G to 8 gallons of water 
and after standing for twenty-four hours dilute to 22 gallons. If de¬ 
sired the amount of verdigris may be increased to 4 pounds without in¬ 
jury to the plants. 
This preparation being comparatively cheap and easily prepared, it 
would be well to test it for downy mildew and black-rot of the grape, 
making the applications as described for Bordeaux mixture and the 
other well-known preparations. 
Another preparation which might be tried for downy mildew is made 
as follows: 
Dissolve 5 pounds of alum in 3 or 4 gallons of boiling water, and 
then pour this solution into a half barrel or tub containing sufficient 
cold water to make 15 gallons. In another vessel dissolve 42 pounds 
of calcium chloride in 3 gallons of cold water. Finally, pour the cal¬ 
cium chloride solution slowly into the alum preparation, stirring con¬ 
stantly to effect a thorough mixing. 
When the two solutions are mixed there is formed aluminium chloride, 
potassium sulphate, and calcium sulphate. It is claimed that the fun¬ 
gicidal property lies in the first, while the calcium sulphate facilitates 
its adhesiveness. The potassium sulphate is, as every one knows, a 
fertilizer and as it is washed from the leaves it enriches the soil. 
In addition to what is said here the papers of Professor Goff and 
Professor Chester should be carefully consulted, as they contain several 
new and important suggestions in regard to the preparation and ap¬ 
plication of fungicides. For the benefit of those having in mind the 
treatment of plant diseases the coming season, we quote below the usual 
prices of the various chemicals used in the preparation of fungicides. 
The quotations are for 100-pound lots. In smaller quantities the prices 
will range from one fifth to one-tliird higher, so that money will be saved 
