130 Reporr oF THE BoTraANICcCAL DEPARTMENT OF THE 
At digging time the market price of potatoes in Albany was 
$1.25 per barrel or 41 cents per bushel. At this rate 241% 
bushels of potatoes would be worth $10.04. - Subtracting $4.92, 
the cost of spraying, there remains a net profit of $5.12 per acre. 
In this experiment, as in some others, the yields would have 
been larger and the gain due to spraying greater if the plants 
had had a chance to mature before frost. 
THE WOODBURY EXPERIMENT. 
This experiment was made by R. C. Colyer at Woodbury on 
Long Island. Fourteen acres were sprayed seven times with a 
“ Watson” sprayer bought of the Field Force Pump Company, 
Elmira, N. Y. This is a one-horse power sprayer which covers 
four rows at each passage. (See Plate XII, fig. 2.) It is fitted 
with one Vermorel nozzle per row and was so used in the first 
three sprayings; but when the vines became large, Mr. Colyer, 
finding that the plants were not being thoroughly covered by 
the spray, put on two nozzles per row. This proved satisfactory. 
The soil was sandy loam. There were two varieties, namely, 
Gold Coin and Green Mountain. In the latter variety three 
rows were left unsprayed. They were 790 feet long by three 
feet wide, 18.38 rows being required to make an acre. 
The dates of spraying were June 22, 29; July 6, 15, 24; 
August 3 and 12. Paris green for bugs was used with the bor- 
deaux in the first spraying at the rate of 114 pounds to fifty 
gallons. The unsprayed rows were treated once with paris 
green applied dry with a Leggett powder gun. 
The experiment was examined by one of the writers on July 
23. Already there was a marked contrast in appearance between 
the sprayed and unsprayed rows. The unsprayed rows showed 
considerable injury from early blight, Alternaria solani, and 
flea-beetles. Late blight, Phytophthora infestans, was also a fac- 
tor, but less important than the other two. Even on the sprayed 
portions of the field flea-bettles were very plentiful and doing 
Some damage, but not nearly as much as on the unsprayed - 
rows. . 
On August 11 the experiment was inspected a second time. 
The unsprayed rows were now dead and dry throughout their 
entire length. The sprayed rows adjacent still retained about 
