26 GARDEN FOES. 



Uses. — bianie as lor Bordeaux Mixture. 

 Time to Apply. — See notes in connection with each 

 disease. 



22. Ammoniacal Copper Carbonate Solution. 



— Allied to Bordeaux Mixture, and chiefly used in green- 

 house work. The solution is prepared as follows: 



Carbonate of copper loz. 



Carbonate of ammonia 5 oz. 



Soft water 16 gal. 



The two chemicals are dissolved together in about a 

 quart of hot water, and stirred until a clear blue liquid is 

 formed, and then the remainder of the water is added 

 for spraying. If desired, the strong solution can be kept 

 bottled, and if the above quantities when dissolved are 

 made up to three pints, a Winchester quart bottle will 

 hold it nicely, and a convenient strength for dilution is 

 formed — viz., one part of the stock solution to 40 parts 

 of water. Many writers advise its use because it leaves 

 very little deposit. This is pernicious advice ; all fruit 

 should be wiped before marketing where poisonous fungi- 

 cides have been used, especially when grown under glass. 



Uses. — For spraying tomatoes in the open or under 

 glass, for the prevention of various fungoid diseases. 



Time to Apply. — In spring or summer, either before 

 disease appears or directly afterwards. 



23. Potassium Sulphide — A well-known fungicide, 

 and one nuich used, is potassium sulphide, strength ^oz. 

 to the gallon of water. It is best fresh made, but a stock 

 solution kept in the dark and well corked will keep good 

 a long time. If lib. of the sulphide is dissolved and made 

 up to three pints it can be stored in bottles, and two fluid 

 ounces of it used to every gallon of water for spraying. 

 Potassium sulphide requires boiling to dissolve it, and this 

 operation must take place in an enamelled saucepan, or 

 the chemical be put in a jar stood in boiling water. Add 

 the whites of two eggs to the solution to cause it to 



