New York AGRICULTURAL EXPERIMENT STATION. 673 
The same may be said of the solvent action of the compounds 
of ammonia which are absorbed to a slight extent from the 
atmosphere by rain water. 
I am not inclined to attribute the general injury to foliage and 
fruit in 1894 from spraying to the fact that the preparation of 
the mixture was governed by the potassium ferrocyanide test, 
since no injury was noticed in the previous year from mixtures 
- prepared according to this method, but rather am I disposed to 
attribute the trouble to the spraying combined with the unfavor- 
able weather about the time the injury first became apparent. 
From what has been said above, it appears that an unusual pro- 
portion of the copper compounds applied to the fruit and foliage 
in spraying might be dissolved in the frequent rains. For 21 
days it rained every day — the weather during the most of that 
period being cloudy and cold when not rainy. The long-continued 
cloudy weather and the abundant supply of water to the roots 
of the trees, occurring at a period of very active growth when 
the first leaves were developing, naturally would tend to produce 
a tender condition of the leaves and fruit. It seems quite prob- 
able that in this condition of the leaves and fruit, and in the con- 
tinued solvent action of the rain on the particles of Bordeaux 
mixture adhering to the sprayed leaves, we find the explanation 
for the unusual injurious effects which accompanied the use of 
Bordeaux mixture in 1894. 
Injury to Apples from Bordeaux Mixture. 
One of the first reported instances of injury to apples, from the 
use of Bordeaux mixture, which has come under my observation is 
that mentioned by Weed,” in 1890, who states that experiments 
have shown that it is not safe to use bordeaux mixture against 
apple scab, since it injures the apples. Neither the strength nor 
the manner of making the mixture is given in this instance. 
Green,” referring to the statement just quoted, says that the 
reported injury followed the use of strong Bordeaux mixture. In 
Bulletin 48 of the Ohio Experiment Station, 1893, page 10, he cau- 
tions against using Bordeaux mixture more than twice after bloom- 
ing, since, “ when applied too late in the season it sometimes causes 
_ 25 Weed, Clarence M., Bulletin 4, vol. ITI, 1°99, Ohio Experiment Station, p. 142 
26 Green, W. J., Bulletin 9, vol. IV, 189., Ohio Experim nt station, p. 193. 
mo 
