84 CELERY CULTURE 



about one pint for an ounce of copper carbonate. 

 Care should be exercised that all of the ammonia 

 is acted upon by the copper or burning of the 

 leaves may result. Before adding the copper car- 

 bonate the ammonia water should be diluted with 

 2 or 3 pints of cold water. A stock solution may be 

 prepared and an amount containing I ounce of cop- 

 per carbonate diluted to 9 gallons for use. 



Bordeaux mixture for use on celery is prepared 

 by slaking 6 pounds of fresh quicklime in sufficient 

 water to prevent its burning, then adding water to 

 make 25 gallons of the milk of lime. At the same 

 time dissolve 6 pounds of copper sulphate, also 

 known as bluestone, and blue vitriol, by placing it in 

 a porous burlap bag and suspending it in 25 gallons 

 of water. When required for use, these solutions 

 are well stirred and poured simultaneously into a 

 cask or barrel of sufficient size to hold the entire 

 amount. (See Fig. 35.) The solutions should be 

 passed through a strainer as they are being mixed 

 in order to remove any particles that would interfere 

 with the working of the pump or spray nozzles. 

 Stock solutions of the lime and copper may be pre- 

 pared ready for dilution and use at any time by dis- 

 solving the lime and copper in separate tanks at the 

 rate of i pound to a gallon of water. In making the 

 mixture from the stock solutions stir well and then 

 take 6 gallons of each and add 38 gallons of water, 

 making 50 gallons in all. Bordeaux mixture should 

 be used as soon as made, and while the copper solu- 

 tion will keep indefinitely the lime will give better 

 results if freshly slaked. Bordeaux mixture will 



