New YorK AGRICULTURAL EXPERIMENT STATION. 93 
Second sprayed row on the west, 1056% lbs. marketable tubers. 
Second sprayed row on the east, 915% lbs. marketable tubers. 
Middle unsprayed row, 892 lbs. marketable tubers. 
Yield, sprayed, 191 bu. 56 lbs. marketable tubers per acre. 
Yield, unsprayed, 173 bu. 38 lbs. marketable tubers per acre. 
Gain, 18 bu. 18 lbs. marketable. tubers per acre. 
These figures misrepresent the actual effect of spraying in the 
experiment; since the average yield per acre for the field was 
262.5 bushels, which is 70 bushels per acre more than the yield 
of the sprayed rows in the test. From the striking contrast in 
the appearance of the foliage on sprayed and unsprayed rows, 
we expected a difference of 60 bushels per acre or more; and were 
surprised to find the gain so small. There was evidently some 
unknown factor to influence the yield on the test rows. 
Only three rotten tubers were found in the test rows. 
The yield of small potatoes was at the rate of 10 bu. Io Ibs. 
per acre for the sprayed rows and 17 bu. 11 Ibs. per acre for 
the unsprayed rows. 
The market price of potatoes being fifty cents per bushel, 18 bu. 
18 lbs. would be worth $9.15. After deducting the expense of 
spraying, $5.10, there remains a net profit of $4.05 per acre. 
THE MEMPHIS EXPERIMENT. 
This experiment was conducted by Michael Bowes, Mem- 
phis, Onondaga County. Mr. Bowes sprayed 9% acres of potatoes 
four times with bordeaux mixture, using a home-made, four-row 
sprayer pumped by hand and drawn by one horse. The pump 
used was a common force pump and the nozzles (one for each 
row) were of the Vermorel type. Water for making the bordeaux 
was drawn to the field in barrels a distance of 130 rods. One 
man prepared the bordeaux while another did the spraying. The 
dates of spraying were July 12, August 2, 16 and 30. The quantity 
of bordeaux applied in each spraying was about 4o gallons per 
acre. 
“ Bugs ”’ became numerous before the spraying materials arrived. 
This necessitated going over the entire field once with paris 
green in water before spraying was begun. As this had nothing 
to do with the spraying for blight the expense is not included 
in the expense of spraying. The treatment was so successful that 
no further_use of poison was necessary. 
There were two unsprayed strips of four rows each. In the 
latter part of the season these unsprayed rows appeared some- 
