By using boiling water and allowing the hot mixture to stand for half an hour, a stronger spray mixture of the above can be secured. It cannot be used safely on peaches, but has been used successfully on grapes for surface mildew. The addition of sulfate of iron or sulfate of copper, one or two pounds to 50 gallons, has been used for apple rust.

Potassium sulfid (liver of sulfur). - Simple solution 3 ounces in 10 gallons of water. For mildew in greenhouses, on rose-bushes and other ornamentals.

Resin-sal-soda sticker. - Resin, 2 pounds ; sal soda (crystals), 1 pound, water, 1 gallon. Boil until of a clear brown color, i.e. from one to one and a half hours. Cook in an iron kettle in the open. Add this amount to 50 gallons of bordeaux. Useful for onions, cabbage, and other plants to which spray does not adhere well.

Sulfate of copper (blue vitriol). - Dissolve 1 pound of pure sulfate of copper in 25 gallons of water. A specific for peach leaf-curl. Apply once before buds swell in the spring. Cover every bud. For use in preparing bordeaux mixture. Costs from 5 to 7 cents per pound, in quantity.

Sulfate of iron (copperas). - A greenish granular crystalline substance. Dissolve 100 pounds in 50 gallons of water. For mustard in oats, wheat, etc., apply at the rate of 50 gallons per acre. Also for anthracnose of grapes as a dormant spray.

Sulfur (ground brimstone, sulfur flour, flowers of sulfur). - Should be 99 per cent pure. Valuable for surface mildews. Dust on dry or in the greenhouse used in fumes. Evaporate it over a steady heat, as an oil stove, until the house is filled with vapor. Do not heat to the burning point, as burning sulfur destroys most plants. To prevent burning, place the sulfur and pan in a larger pan of sand and set the whole upon the oil stove.