New YorK AGRICULTURAL EXPERIMENT STATION. 387 
Other constituents were present in small amounts but are 
of no interest in relation to the lime-sulphur wash. It appears 
from analysis to be largely a mixture of free sulphur and lime 
containing a considerable amount of magnesium oxide. 
The material is used in preparing the lime-sulphur wash by 
mixing at the rate of three-quarters of a pound for one gallon 
of boiling water and boiling three to five minutes. It would 
therefore require 37.5 pounds of the powder to make 50 gallons 
of mixture of proper strength for spraying. 
A solution was prepared according to the directions given. 
Of the powder used, about 38 per ct. did not go into solution. 
The filtered solution contained about 3.75 per ct. of soluble 
combined sulphur and 2 per ct. of calcium. The sediment con- 
tained 30.24 per ct. of sulphur, mostly free, about 20 per ct. 
of calcium oxide, and nearly 34 per ct. of magnesium oxide. 
In the descriptive circular, the statement is made that the sedi- 
ment consists largely of lime, which does not agree with our 
results of analysis. If a purer form of lime were used, more 
efficient results could be obtained. Apparently, a much larger 
proportion of the sulphur remains uncombined than in the pre- 
paration of the regular home-made lime-sulphur wash. 
The cost of the material is five cents a pound, with a reduc- 
tion of price for large purchases. At the maximum rate of five 
cents a pound, 50 gallons of the wash ready to apply to trees,. 
prepared with this powder, cost $1.875, counting only the cost. 
of the preparation used. Compared with concentrated com- 
mercial lime-sulphur washes at ten dollars for 50 gallons, 
which amount makes 450 gallons of wash ready to apply to 
trees, the “ Never-Scale”’ wash is considerably more expensive, 
assuming that it is of equal value in destroying insects. To 
make 450 gallons of spraying solution with “ Never-Scale ” 
would require an amount which, at five cents a pound, would 
cost $16.875. In order to approximate the same cost as con- 
centrated commercial solutions of good grade, ‘‘ Never-Scale ” 
would need to sell at about three cents a pound and this does 
not make any allowance for the cost of boiling the mixture. 
