SLL REpoRT OF THE BOTANICAL DEPARTMENT OF THE 
The results in this experiment are not of much value. Part of 
the increase in yield on the sprayed rows was due to their having 
been protected from bugs while the unsprayed rows were neglected 
and suffered considerably from bugs. Matters were further com- 
plicated by the accidental spraying of the three unsprayed rows. 
Mr. Cook thinks that this spraying afforded the unsprayed rows 
considerable protection against late blight and his view is sup- 
ported by the fact that his potato field, including the unsprayed 
rows, remained green after all others in the neighborhood were 
dead from blight. 
THE MADRID EXPERIMENT. 
This experiment was made by W. E. Griffith at Madrid in St. 
Lawrence County. Two and two-thirds acres were sprayed four 
times. The variety was Carman No. 8. The soil was a fertile | 
clay loam. The potatoes were planted early but came out poorly, 
making a thin stand of plants. Three rows 614 feet long and 3 
feet apart were left unsprayed. To make an acre required 23.64 
TOWS. 
The spraying was done with a home-made outfit consisting of 
a one-horse, two-wheeled cart carrying a fifty-gallon barrel with 
a hand spray pump attached and arranged to spray three rows at 
a time with two Vermorel nozzles per row. (See Plate X, fig. 
1.) A one-armed man did both the pumping and driving. It 
was necessary to haul the bordeaux about 40 rods. 
The dates of spraying were June 30, July 11, 16 and 27. At 
each spraying paris green was used with the bordeaux at the 
rate of one pound to fifty gallons. In addition, the plants were 
treated twice with paris green in water at the same rate, making 
in all six applications of poison to the sprayed rows. The 
unsprayed rows were given seven applications of paris green in 
water, one pound to fifty gallons. It would seem that this very ~ 
thorough treatment should have kept bugs entirely under con- 
trol, but Mr. Griffith reports that it did not and that the 
unsprayed rows were slightly more injured by bugs than those 
sprayed. 
No record was kept of the progress of blight. All we know is 
that the unsprayed rows were considerably affected by late blight 
on August 6, and that both sprayed and unsprayed plants died 
