New York AGRICULTURAL EXPERIMENT STATION. 137 
ar pounus paris preen at 15 Cents... eee ee we ce $13 05 
qo Hours tabor for man at 20 cents. 0... oF. 2 ewe 15 80 
3814 hours labor for boy at 10 cents............... 3 85 
<9 hours labor.for horse at 10 cents..:............. 7 90 
Rr TAN OL iss scares wigan (ele Mitua.g sitlera® 404.8 5 00 
ea DE Fe OP LEE te eee 23% $77 50 
Total cost of spraying per acre........ Potrcaeeo re aes $5 11 
Cost per acre’ for, each. spraying®® 20... 1k ee ; dL 
At 45 cents per bushel, the market price of potatoes at digging 
time, 14 bushels of potatoes would have a value of $6.30. Sub- 
tracting $5.11, the cost of spraying, there remains a net profit of 
$1.19 per acre. 
SOUTHAMPTON EXPERIMENT NO. l. 
This experiment was conducted by H. A. Jagger at South- 
hampton in the eastern part of Long Island.*t It included 14 
acres of potatoes in three lots. Eight and one-half acres were 
sprayed 8 times and the remaining 514 acres 6 times. In one 
of the lots sprayed 8 times and called the “ experiment lot,” three 
rows 622 feet long, 22-3 feet apart, were left unsprayed for a 
check. The soil: was a sandy loam and the variety of potato 
Carman No. 1. 
The spraying was done with the same outfit used in the experi- 
ment in 1903; namely a one-horse, home-madewv rig consisting 
*The low expense of spraying in this experiment, 51 cents per acre, is 
partly due to the small quantity of bordeaux used and partly to the con- 
venient facilities for making bordeaux as shown in Plate XIII, fig. 2. The 
mixing is done in barrels on two platforms placed one above the other stair 
' fashion. The barrel with a shovel in it containes the stock lime. The other 
barrel, standing against the building, contains a stock solution of copper 
sulphate. The two barrels in front. on the upper platform are “ dilution” 
barrels, one for lime water, the other for copper sulphate solution. The 
two barrels on the lower platform are “mixing” barrels. By means of two 
short pieces of hose the contents of the two dilution barrels are drawn off 
simultaneously into one of the mixing barrels. From the mixing barrel 
the prepared mixture runs into the spray tank through another short piece 
of hose and while this is in progress the other mixing barrel is being filled 
so there is as little time wasted as possible. The water required comes from 
a tank in the barn, which is filled by means of a windmill. There is no 
dipping or lifting of water or bordeaux. The work is all done by gravity. 
*1 For several years past Mr. Jagger has made a regular practice of spray- 
ing potatoes and believes that it is profitable. In 1903 he conducted a busi- 
ness experiment for the Station. A full account of this experiment is given 
in Bulletin 241, pp. 267-269. , 
