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New York AGRICULTURAL EXPERIMENT STATION. 83 
rows was partly the result of injury from arsenite of soda 
applied in lime water. Arsenite of soda is a cheap and effective 
insecticide and may be used with safety on potatoes if applied 
with bordeaux mixture at the rate of not more than two quarts 
of the arsenite to fifty gallons of bordeaux. It should be used 
only with bordeaux mixture. | 
THE SILVER SFRINGS EXPERIMENT. 
This experiment was conducted by F. J. Austin, Silver Springs, 
Wyoming County. Twenty-two acres of potatoes, all in one 
field, were sprayed six times with a two-horse, four-row Aspin- 
wall potato sprayer. The first two sprayings were made with 
one nozzle per row while in the last four sprayings two nozzles 
per row were used. (We believe this to be a good practice.) The 
dates of spraying were as follows: July 5-6, 14-16, 25-26, Au- 
gust 6-7, 13-16 and September 5. 
Prepared lime was used in making the bordeaux. The water 
required was taken from a creek and drawn to the potato field 
in barrels on a stone boat a distance of about forty rods. The 
man who drew water also prepared the bordeaux and employed 
the remainder of his time in hoeing. 
The potatoes were of two varieties, Carman No. 3 and Sir 
Walter Raleigh mixed. They were planted on clover sod be- 
tween May 25 and June 7 in drills fifteen inches apart in the row 
and thirty-three inches between the rows. 
Four rows were left unsprayed for a check.: “ Bugs” were 
kept under complete control on these rows by two applications 
of arsenite of soda in lime water. On the sprayed portion of the 
field arsenite of soda was used three times at the rate of tnree 
pints of the stock solution to fifty gallons of bordeaux. Mr. 
Austin states that there was no difficulty whatever in controlling 
* with this amount of poison. 
We examined this experiment twice — July 31 and August 31. 
At the time of our first visit the check rows were in no way 
different from the sprayed rows except that the foliage of some 
plants was very slightly injured by the arsenite of soda. There 
were no insect enemies and no blight of any kind. The plants 
were looking well but did not yet quite cover the ground. 
At the time of our second visit late blight was beginning to 
appear all along the check rows, especially at the east end where 
‘ the rows ran down to the foot of a hill. The checks were now 
