New York AGRICULTURAL EXPERIMENT STATION. 19 
experiment at Geneva five very thorough sprayings increased the 
yield 233 bushels per acre while three sprayings increased it 191 
bushels. In a duplicate of this experiment at Riverhead the gain 
due to six sprayings was 9614 bushels per acre, and to three 
sprayings 5614 bushels. 
In one experiment soluble bordeaux was compared with soda 
bordeaux and with the regular lime bordeaux. Soluble bordeaux 
increased the yield 11 bushels per acre; soda bordeaux 51 2-3 
bushels per acre; and lime bordeaux, 68 1-3 bushels per acre. The 
conclusion is that neither the soluble bordeaux nor the soda 
bordeaux is to be recommended, at least until further tests have 
been made. 
Effect of arsenites on potato foliage.-—Two arsenites were tested 
paris green and arsenite of soda. 
_The experiments with paris green were designed to determine 
whether it is injurious to potato foliage when properly applied. It 
was used with bordeaux, with milk of lime and with water. Some 
rows received bordeaux only and others no treatment of any kind, 
the bugs being controlled by hand picking. There was no evidence 
that the paris green injured the foliage anywhere and the rows 
receiving paris green outyielded those to which no paris green had 
been applied. An unexpected result of the experiment was the 
discovery that paris green has some value as a preventive of 
blight. Rows treated with paris green in water yielded 46 bushels 
per acre more than the check rows. 
The experiments with arsenite of soda indicate that if used in 
bordeaux it may be safely applied to potato foliage; but when 
used with milk of lime serious injury may result. Safety requires 

that it be used only in combination with bordeaux mixture. 
Winter injury to fruit trees. The extremely low temperature of 
the winter of 1903 and 1904 together with the unfavorable weather 
conditions and insect and fungus epidemi¢s of 1904, injured or 
killed many fruit trees in the State, especially in the Hudson 
River Valley. | 
Old trees did not withstand the cold nor recover as well as 
young trees. Difference of variety was usually subordinate to 
location, age and previous health of the trees, though in many 
cases there was plainly a difference in the susceptibility of 
varieties. 
