150 REPoRT OF THE BOTANICAL DEPARTMENT OF THE 
EXPERIMENT NO. 9. 
Conducted by Thomas Beaumont, Castile. Eleven acres of 
potatoes, Rural New Yorker No. 2, were sprayed five times with 
the same kind of an outfit as that used in Experiment No. 8. 
It was operated by two men, one to drive and one to pump. 
Four rows 50 rods long, 33 inches apart, were left unsprayed for 
a check. The copper sulphate used cost six dollars and the lime 
one dollar. 
One of the unsprayed rows yielded 420 pounds, which is at the 
rate of 18384 bushels per acre; while a sprayed row, only one 
row distant from the unsprayed row, yielded 496 pounds or 158 
bushels per acre. This shows that spraying increased the yield 
at the rate of 2414 bushels per acre. There was no rot. 
Although not injured by bugs, the unsprayed rows died about 
two weeks before the sprayed rows (still in full foliage) were 
killed by frost. No poison was used on either sprayed or un- 
sprayed plants. Owing to continued wet weather in the spring, 
planting was delayed until June 15. Had the sprayed plants been 
able to complete their growth the increase in yield due to spray- 
ing would certainly have been greater. Mr. Beaumont had never 
sprayed potatoes before. 
Market price of potatoes at digging time, 45 cents. 
EXPERIMENT NO. 10. 
Conducted by S. H. Cridler, Hornellsville. Nine and one- 
fourth acres of potatoes, variety Carman No. 3, were sprayed three 
times with an Aspinwall automatic four-row sprayer commenc- 
ing about July 10 and repeating at intervals of two weeks. Four 
rows, 40 rods along, 34 inches apart, through the center of the 
field, were left unsprayed. The total cost of spraying was $1.52 
per acre, including labor.’ 
One unsprayed row yielded 11 bushels or 256 bushels 18 pounds 
' per acre, while a sprayed row nearby yielded 12 bushels or 279 
bushels 36 pounds per acre, making the gain due to spraying 2314 
bushels per acre. There was no trouble from bugs or rot. Mr. 
Cridler’s average yield was 230) bushels per acre. 
These potatoes were planted May 20, yet when frost came they 
were as green as ever except the four unsprayed rows which were 
partly dead and in some places entirely dead. The sprayed plants 
