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| _Potassium sulfide._--Potassium sulfide (liver of sulfur), 3 oz.; water, | ||
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Chapter 3. PROTECTING PLANTS FROM THINGS THAT PREY ON THEM | 
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10 gal. As this mixture loses strength on standing, it should be made just before using. It is particularly valuable for the powdery mildew of many plants, especially gooseberry, carnation rust, rose mildew, etc.
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| _Ammoniacal copper carbonate._--Copper carbonate, 5 oz.; ammonia, 3 pt.; |  |
_Sulfur._--Sulfur has been found to possess considerable value as a |