22 



paste. Put this paste into a convenient barre! or large tub and 

 cover with plenty of water. It will keep as long as desired in 



this way but if it dries it is useless for making Bordeaux " 



'...A suitable quantity of copper sulphate shóuld be se- 

 eured also and stored in a dry place in a securely closed box, 

 as i1 is poison." 



*A test solution should be prepared as follows: G-et ten 

 cents worth of yellow prussiate of potash (patassium ferro eya- 

 nide) and put it into a elean bottle of convenient size (About 

 L'our ounces) and add about ten times as mueh ciean water as 

 cyanide. Label this poison, Bordeaux Test Solution, and keep 

 i n a safe place". 



'"llave a wooden fifty gallón barrel and a tub or otber 

 barrel ready for making the Bordeaux. Having the materials 

 ready, they can be used at any time and they will not deteriórate 

 il' the lime «loes not get dry". 



" prepare the Bordeaux as follows: Clean the bar- 

 rel whieh is to eontain the Bordeaux and fill it half full of clean 

 water. Take the six pounds or 2.7 kilos of copper sulphate and 

 tie it in a piece of sack and suspend it just below the surface of 

 the water. In a few hours all the copper sulphate will be dis- 

 solved. If hot water is used it will be dissolved very quickly 

 and in a smaller amount of water. Now take fifteen pounds 

 or 7 kilos of the thiek lime paste from the barrel in which it is 

 kept and put it in a tub. Add water and stir it up to a smooth 

 lime milk and add water to make a half barrel. Dip the li 

 milk out of tlie tub and pour it slowly into the copper sulphate 

 solution, strirring rapidly. When the color beeomes a deep 

 blue, add a few drops of the test solution to the mixture of the 

 lime milk and copper sulphate. If a dark brown color is form- 

 ed, more lime is needed. Continué adding lime milk until no 

 brown color is formed on adding the test solution. When this 

 point is reached the Bordeaux is neutralized, but to be entirely 

 safe, add one half more lime than that already added. Fill the 

 barrel with water to make fifty gallons or 190 litres. The Bor- 

 deaux is now ready for use. This niethod is adapted for treat- 

 ing small (tobáceo) seed beds. For preparing large quantities 

 of Bordeaux, more convenient arrangements can be made." 



