New York AGRICULTURAL EXPERIMENT STATION. 125 
8 
Experiment No. 30.— Mr. Tuthill states that the yields reported 
for this experiment are for unsorted potatoes. If the potatoes 
had been sorted it is likely that the difference between the 
sprayed and unsprayed rows would have been somewhat greater 
because usually more small potatoes are found on the unsprayed 
rows. 
The sprayed rows retained a large part of their foliage about 
two weeks after the unsprayed rows were dead. There was 
very little rot. 
Expervment No. 31.— The yields given in Table XVI are the 
average of three tests as follows: 
Test No. 1— One sprayed row, 77 lbs. = 205 bu. 20 Ibs. per acre. 
One unsprayed row, 51 lbs. 136 bu. per acre. 
Gain, 69 bu. 20 Ibs. per acre. 
Test No. 2.— One sprayed row, 485 lbs. 173 bu. 28 Ibs. per acre. 
One unsprayed row, 354 lbs. — 126 bu. 37 lbs. per acre. 
Gain, 46 bu. 51 lbs. per acre. 
Test No. 3.— One sprayed row, 445 lbs. = 176 bu. 22 Ibs. per acre. 
One unsprayed row, 379 lbs. — 150 bu. 13 lbs. per acre. 
Gain, 26 bu. 9 Ibs. per acre. 
In the field containing Test No. 1 late blight started unusually 
early. From an examination of the conditions we incline to the - 
opinion that this early outbreak was traceable to refuse from a 
nearby potato pit in which diseased tubers had been stored. 
In Test No. 3 both the sprayed and unsprayed rows were 
killed by frost. Probably the gain would have been larger if 
frost had not come so early. 
Experiment No. 32.— The test rows in this experiment were 
80 rods long. The yields were as follows: 
Two sprayed rows, 2,550 lbs= 235 bu. 38 Ibs. per acre. 
Two unsprayed rows, 2,050 lbs.—= 189 bu. 27 Ibs. per acre. 
The expense for copper sulphate and lime was $13.45 and 
the labor is estimated at three days for man and team, or $0, 
making a total of $22.45. The “bugs” were kept under control 
on the sprayed rows by using arsenite of soda solution (arsenic 
and sal soda boiled together) with the bordeaux in the first 
three sprayings, and on the unsprayed rows by two applications 
of paris green in water. The bordeaux (6-6-50 formula) was ap- 
plied at the rate of about 50 gallons per acre in each spraying. 
Judging from Mr. Taylor’s report and from personal examina- 
