he REPORT OF THE CHEMIST OF THE 
(7) Lime in sediment.— The amount of lime in sediment in- 
creases with the time of boiling; this naturally accompanies 
the formation of calcium sulphite, which, being insoluble, 
appears as a part of the sediment and usually as a very large 
part of it. 
ANALYSIS OF HOME-MADE PREPARATIONS, 
In order to ascertain the composition of some lime-sulphur 
washes which had been prepared under the direction of the 
Station Entomologist and used in regular work, analysis was 
made of preparations made according to two formulas. We 
may regard these as representing home-made preparations of 
a good type. : 
Samples 13, 14 and 15 represent concentrated preparations 
made with 125 pounds of sulphur, 65 pounds of commercial 
lime (containing 79.4 per ct., equal to about 52 pounds, of cal- 
cium oxide), and enough water added to make 50 gallons of 
completed mixture. In spraying, this solution is diluted with 
8 or 9 parts of water. Samples 16, 17 and 18 represent prepa- 
rations made by the old standard formula, 15 pounds of sul- 
phur, 20 pounds of commercial lime (containing about 16 
pounds of calcium oxide), and enough water to make 50 gallons 
of mixture; this kind of mixture is used in spraying without 
further dilution and without removal of sediment. Prepara- 
tions 13-15 contained small amounts of sediment, since the 
solution was drawn from the kettle into barrels after the 
coarse portion of the sediment was allowed to settle and while 
there was more or less fine matter still in suspension. 
(1) General character of home-made preparations.— The fil- 
tered solution was reddish-golden in case of the concentrated 
preparations and golden-yellow in case of the dilute. The 
sediment, as seen in the mixture, was olive-green in color in the 
concentrated preparations and light-vellow in the dilute. The 
degrees Beaumeé in the concentrated mixtures (13-15) varied 
from 25.2 to 29.2. 
(2) Composition of home-made preparations.—— The data 
under this head will be presented in two tables, giving (1st) 
