272 STATE HORTICULTURAL SOCIETY. 



We have been much pleased with the results obtained from the above 

 weak solutions. Formula (B) can be used without danger of injuring the 

 foliage upon all except the most tender plants, but for use upon the peach 

 and other tender plants we prefer to rely upon the still weaker solution as 

 given in formula (C). 



AMMONIACAL COPPER CARBONATE. 



Copper carbonate 1 ounce 



Am monia enough to dissolve the copper 



Water 12 gallons 



Dissolve the copper carbonate in the ammonia and dilute before using. 

 The undiluted solution can be kept in glass- stoppered bottles for some 

 time. The strength of ammonia water generally found at drug stores is 

 20° Baum6. This will answer as well as the 22° or 26° which are generally 

 recommended, but more of it will be required to dissolve the copper, about 

 one pint being necessary for each ounce of the carbonate. 



From the fact that copper carbonate as sold on the market is rather 

 costly, it will be better to manufacture it, if much is to be used. For this 

 take 



Copper sulphate 2 pounds 



Soda carbonate (sal-soda) 2| pounds 



Dissolve these separately in about two gallons of water, pour together, 

 and stir thoroughly. A precipitate of copper carbonate will form and sul- 

 phate of soda will remain in solution. The water can be poured off and 

 the precipitate dried and kept indefinitely. From the above quantity of 

 copper sulphate and soda carbonate about one pound of dried carbonate of 

 copper will be obtained. It is often used without drying, however, by 

 adding enough ammonia water to dissolve the copper carbonate and dilut- 

 ing to forty gallons. It is then known as modified eau celeste. 



POTASSIUM SULPHIDE. 



Potassium sulphide (liver of sulphur) 3 ounces 



Water 10 gallons 



This solution is valuable to use for gooseberry mildew, as it in no way 

 discolors the fruit and is quite harmless. 



Like Bordeaux mixture, the last three preparations are for the destruc- 

 tion of fungous diseases, and they should not be relied upon to destroy 

 insects. 



