New York AGRICULTURAL EXPERIMENT STATION. 117 
per acre of good paris green is added to the bordeaux, whenever 
the seasonable and persistent potato bugs arrive in destructive num- 
bers. This will, under favorable climatic conditions, appease their 
insatiable appetite by complete annihilation. It costs no more in 
labor and material to destroy these beetles before the potato plant 
is partially or wholly defoliated, than after the damage is done. 
If potatoes are allowed to be ravaged by insect pests, they receive 
a shock which is seldom recovered from, also disease is courted and 
allured to these raw, enfeebled plants. “Don’t lock the stable door 
after the horse is stolen.’ 
“In order to do effective spraying, each application should be 
made in opposite directions; two such sprayings will be called a 
double application. July 2oth the potato vines well covered the 
ground, and from this time on, at the beginning of each double 
application, all nozzles are directed to the left and down, at a 45 
degree angle, twice over field, then into the centers of the rows; 
twice over, and then the nozzles are all directed to the right and 
twice over; going reverse ways each time. This plan requires six 
single or three double applications, and the spray is directed against 
the potato-plant, from six different positions and angles, and at the 
completion of the sixth spraying, every part of each plant will re- 
ceive a film of copper plating from top to bottom. This spraying 
might be likened to the famous ‘enveloping and flanking move- 
ments’ of the Yankees of the East at Mukden. Twenty-three bar- 
rels of bordeaux made one double application. Thorough spraying 
cost us $12 per acre. One unsprayed row yielded 16 bu. of pota- 
‘toes. Next adjoining sprayed row yielded 23% bu. and yielding 
respectively 288 and 423 bushels per acre. By request of the 
Geneva Experiment Station, the spraying data was forwarded to 
Prof. F. C. Stewart, who computed the average gain due to 
spraying to be 127 bu. 29 lbs. per acre. Figuring this increase at 
40c per bushel, a gain of $51.00 per acre would result. Deducting 
$12.00, the cost of spraying, a profit of $39.00 per acre; would be 
realized as a net gain, and undoubtedly total on the whole crop a 
clear profit exceeding $600.00, due entirely to spraying; therefore, 
further argument is unnecessary. ‘ Facts are stubborn things.’ And 
there are other valuable benefits Bouied from spraying, aside from 
the increase in crop. 
“The sprayer used is a one-horse, two-wheeled, geared, home- 
made affair, on which is mounted a 3x5-inch Rumsey, double- 
acting force pump, air-chamber, 50 gal. spray barrel, revolving 
-- agitator, pressure gauge, relief valve and six bordeaux nozzles, for 
