SPRAYING NOTES FOR 1904-1905. 63 
ground fine and prepared for immediate use and strongly rec- 
ommended by the makers is on the market under several dif- 
ferent names: prepared lime, limiod, etc. Canaan lime, which 
is a magnesium lime, made at Canaan, Conn., is the best known 
in this state, and a calcium lime known as “‘Jaunta’’ lime, 
made at Glens Falls, N. Y., is used to some extent. 
Three samples of Bordeaux mixture were made from these 
different kinds of lime to compare them as to fineness of the 
precipitate, as determined by the time the mixture remained 
in suspension. ‘The three samples were made at the same time 
and in the same way. The mixtures were put in glass jars, 
making a depth of mixture of ten inches. One and one-half 
hours after making, the precipitate of the Bordeaux from the 
prepared lime, or limoid, had settled five inches. That made 
from the Canaan lime had settled eighth-tenths of an inch, 
while that made from the Jaunta lime had settled six-tenths of 
an inch. At the end of three hours they had settled six 
inches, two and two-tenths inches, and one and one-fourth 
inches respectively. 
‘The color of these different samples was quite different. 
That of the limoid mixture was a light turquoise blue, the 
Jaunta lime was indigo blue, while the Canaan lime mixture 
was half-way between the two. ‘These differences in the mix- 
tures were attributed to the differences in the chemical constit- 
uents of the three different limes. Samples of each were 
analyzed by Dr. B. B. Turner, Chemist of the Agricultural 
Experiment Station, with the following results: 

Jaunta Lime , Canaan Lime Limoid 
Calcium oxide 94% Calcium oxide 53.5% Calcium oxide 36.6% 
Magnesium oxide 1% Magnesium oxide 4o % Magnesium oxide 28.9% 
95% 93.5% 65.5 
Of the other elements making up the 100 per cent., car- 
bon dioxide was by far the largest constituent. The action of 
lime in making Bordeaux mixture is to precipitate the copper 
sulphate and neutralize the free acid which it may contain. 
This is done by the calcium oxide in the lime. Consequently 
the lime having the largest proportion of calcium oxide is the 
best for this purpose. The mechanical condition of the slaked 
