242 REPORT OF THE BOTANICAL DEPARTMENT OF THE 
THE SOUTHAMPTON EXPERIMENT. 
Conducted by Lewis E. Downs, Southampton, Long Island. 
Fifty-six acres of potatoes were sprayed eight times with a 
two-horse, six-row “ Aroostook” sprayer carrying one nozzle 
per row. The dates of spraying were June 17, 23, July 3, 
10, 14, 20, 21 and 28. The bordeaux used was prepared by 
the formula, 6 Ibs. copper sulphate in 50 gals. of water with 
sufficient lime added to satisfy the potassium ferrocyanide test. 
It was necessary to haul water about 40 rods. It was pumped 
by a windmill. In each spraying two quarts of the arsenite 
of soda stock solution were added to each 50 gallons of bor- 
deaux. There were four unsprayed rows which were treated 
twice with paris green—on June 23 and July 5. There was 
no blight and not many flea beetles. Yet there was consid- 
erable contrast between sprayed and unsprayed rows during 
the last ten days of growth. 
The expense of spraying 56 acres 8 times was as follows: 
2,688 lbs. copper sulphate @ $6.17 per 100 Ibs............... $165.65 
D.6a8 los: ime (@ 16.2070 oo UU es oe ree a eee 26.88 
896sl bs. sal poda@ Lei A oan ee ee ne 2 ee ee ee 8.96 
224:lbsy white arsenic (®. G60. 6.5 sin. ate ee ee ee 13.44 
ES2:hrs. man'labar @ 200... ou. Sess oo ee ee ae eee 36.40 
L82chrs.\ labor for team: BOCs oar. aes ao aha cles a te ae 54.60 
Wear of sprayer: 5 ose s-2s vos: vache rie oe oetenke ee oe meee eee 12.00 
Totals se. sie eee ee eR nln Doe ee ee $317.93 
The test rows were of the variety Carman No. 1. They were 
1,000 feet long by 33 inches wide. The yields were as follows: 
Two sprayed rows, 1,938 Ibs.==254.8 bu. per acre. 
Two check rows, 1,366 Ibs.==180.3 bu. per acre. 
Gain, 74.5 bu. per acre. 
The market price of potatoes at digging time was 80 cents 
per bushel. Accordingly, the gain of 74.5 bu. had a value of 
$59.60. After deducting the expense of spraying $5.68 per 
acre there remains a net profit of $53.92 per acre. 
