CONCENTRATED LIME SULPHUR 71 
with a hydrometer, which will indicate the specific gravity. Procure 
a hydrometer marked according to the Baumé scale, and dilute accord- 
ing to the table given below in the directions for diluting home-made 
concentrated lime sulphur, remembering that this is for use on dormant 
trees only. 
Since this spray material is quite clear, it shows but little on the 
trees. Some operators, therefore, are following the practice of adding 
lime to the material after it is diluted ready for the spray tank, in order 
to make the spray show up. Probably there is no advantage gained 
in efficiency, but one can tell whether the tree is thoroughly coated. 
The lime must be added after the material is diluted. Either lump 
lime or air-slaked lime, at the rate of 6 or 8 pounds to 50 gallons 
of diluted spray, may be employed. It will require about ten minutes 
for the lump lime to slake. Care should be taken to arrange matters 
so that the addition of lime will take place before the final straining. 
Home-made Concentrated Lime Sulphur 
Lump lime ‘ : : : : . 50 pounds 
Sulphur. ; ; : , d . 100 pounds 
Water (hot) : ; : é 5 . 70 gallons 
Dilute as directed. 
If suitable appliances are at hand, it is feasible to make up con- 
centrated lime sulphur at home, which can be diluted for use when 
needed. It is absolutely necessary, however, to keep the finished prod- 
uct sealed up away from contact with air, and it is essential that the 
purity of the materials used be guaranteed. In most cases, it will be 
found that the commercial concentrate is safer. 
To prepare the concentrate, have ready two boilers, one of which 
must be of 100 gallons capacity and is used for boiling the materials, 
while the other serves to keep ready a supply of boiling water to re- 
plenish the material as it boils down. It is advisable to have a measur- 
ing stick, so that the amount of liquid may be ascertained from time to 
time, and hot water added when needed. It is much better if the cook- 
ing can be done by steam, in a closed vessel ; but direct fire will do. 
