New York AGRICULTURAL EXPERIMENT STATION. 83 
deep on April 18 and then harrowed three times. After treat- 
ment with corrosive sublimate for scab, planting was done by 
hand on April 23 with whole tubers of the size of a hen’s egg, 
placed 15 inches apart in the row and the rows 8 feet apart. 
The variety of potato was Carman No. 1, which is very popular 
on eastern Long Island. Home-mixed fertilizer, having the 
formula 4-10-4 and costing $27.20 per ton, was used at the rate 
of 1,100 pounds per acre. The trenches for planting were made 
by going twice over each row with a fertilizer drill, and the 
tubers were covered with the discs of an Aspinwall potato 
planter. <A cultivator was used once and a weeder once before 
the plants came up. After the plants were up the weeder was 
used twice and the cultivator six times. At the last cultivation 
the plants were slightly hilled. A few weeds were pulled and 
a few cut out witha hoe. The soil was well-drained sandy loam 
containing some gravel, and the field sloped moderately toward 
the southeast. 
PREPARATION AND APPLICATION OF THE BORDEAUX MIXTURE. 
The methods of preparing and applying the bordeaux mixture 
were practically the same at Geneva and at Riverhead. The 
bordeaux was made according to the 1-to-8 formula; that is, one 
pound of copper sulphate was used in each eight gallons of bor- 
deaux, or six pounds to the barrel. This is the formula usually 
recommended for spraying potatoes. The amount of lime re- 
quired was determined by the yellow-prussiate-of-potash test. 
The bordeaux was applied by means of a knapsack sprayer, 
except in the first spraying (June 25) at Geneva, in which case it 
was applied with a barrel pump, such as is used for spraying 
trees. 
The spraying was done with great thoroughness, particularly 
at Geneva. No attempt was made to spray the under surface of 
the leaves, but practically every leaf was well coated above. 
When the plants became full grown the foliage of adjacent rows 
intermingled, and thus it was impossible to thoroughly spray 
the rows of series I and II without getting some of the mixture 
on the adjacent unsprayed rows of series III. However, this 
was avoided as much as possible. 
