11 



The carbonate of copper should be dissolved in the ammonia, 

 according to the directions already given, mixed with the water, 

 and the Paris green then added, cure being taken to stir in well, and 

 keep it from settling to the bottom. 



(b.) Carbonate of copper H oz. 



Paris green 1^ oz. 



Water 25 galls. 



The experiments made with this mixture thus far, do not warrant 

 me in speaking positively in regard to its efficacy, but they show 

 that no injury to the foliage resulted from the application of a 

 stronger mixture than the one here recommended for trial. If this 

 proves an effective remedy for the codlin moth as well as the 

 "apple spot" it will no doubt supersede any other now in use, both 

 on account of the ease with which it can be prepared, as well as its 

 comparative cheapness. The Paris green can be omitted after the 

 second application in mixtures (a) and (6), as two sprayings of Paris 

 green is generally considered a sufficient remedy for the codlin moth, 



HOME MANUFACTUEE OF COPPEE CAEBONATE. 



As the precipitated form of carbonate of copper is not always 

 obtainable from druggists, directions are herewith appended for the 

 easy preparation of this mateiial at a cost much less than the usual 

 wholesale price. 



In a vessel capable of holding two or three gallons, dissolve 1^ 

 pounds of copper sulphate (blue vitriol) in 2 quarts of hot water. 

 This will be entirely dissolved in fifteen or twenty minutes, using 

 the crystalline form. In another vessel dissolve If pounds of sal 

 soda (washing soda) also in 2 quarts of hot water. When completely 

 dissolved pour the second solution into the first, stirring briskly. 

 When effervescence has ceased fill the vessel with water and stir thor- 

 oughly ; then allow it to stand five or six hours, when the sediment 

 Avill have settled to the bottom. Pour off the clear liquid without 

 disturbing the precipitate, fill with Avater again and stir as before; 

 then allow it to stand until the sediment has settled again, which 

 will take place in a few hours. Pour the clear liquid off carefully 

 as before, and the residue is carbonate of copper. Using the above 

 quantities of copper sulphate and sal soda, there will be fornaed 

 12 ounces of copper carbonate. 



Instead of drying this, which is a tedious operation, add four 

 quarts of strong ammonia, stirring in well, then add sufficient water 



