30 The Bulletin. 



and on apples only after the young fruits are well formed — say, about 1 

 inch in diameter or larger. 



Some growers use even as high as 5 pounds of bluestone to the barrel 

 and are satisfied; others use 4 pounds, while some who have noticed 

 the rusting effect on the fruit are not willing to use more than 2 pounds 

 to the barrel. After considerable observation on our own tests and con- 

 sultation with officials of the United States Department of Agriculture, 

 we now suggest 3 pounds to the barrel to be used for any sprayings after 

 the young apples are well set — that is, for the fourth and fifth sprayings 

 as given on page 25 of this Bulletin. Some manufacturers sell ready- 

 made Bordeaux preparations, but these have never come into general 

 use in this State. 



Stone lime (unslaked) 4 pounds. 



Bluestone 3 pounds. 



Arsenate of lead 3 pounds. 



Water 50 gallons. 



Put the bluestone in a cloth and hang it in a tub or keg of water so 

 that it is just below the surface. In this way it will dissolve much more 

 rapidly than if throT\Ti in so that it sinks to the bottom. Warm or hot 

 water will dissolve it much more rapidly than cold. Put this to dissolve 

 the evening before it is intended to spray and it will be dissolved by 

 morning. This should be in a wooden receptable. After the bluestone 

 has dissolved add water to make 25 gallons (if there is not that amount 

 already). 



Slake the lime slowly (preferably with hot water), and when com- 

 pletely slaked add water to make 25 gallons. Keep this in a separate 

 keg or barrel. 



We now have 25 gallons of bluestone solution and 25 gallons of the 

 lime solution. We now take equal parts of each of these solutions and 

 pour them together into a third tub or barrel. Do not pour a bucketful 

 of one into a half-barrel of the other, but mix them always in equal 

 quantities. Thus we may take two water buckets and fill one with the 

 lime solution and the other from the bluestone solution and then pour 

 them both at the same time into the third barrel or keg. This little 

 point of always mixing them in equal quantities results in a better mix- 

 ture than when they are carelessly mixed, or when the whole mass of one 

 solution is poured bodily into the whole mass of the other. Always stir 

 the solution well before dipping out, so that the liquid you take out 

 shall be fully charged vnth the ingredients of the solution. 



Adding the Poison. —The arsenate of lead paste is first dissolved in 

 just enough water to make it liquid and is then stirred into the Bordeaux 

 Mixture. It is then ready to apply. 



Strain Before Using. -Before using, the mixture must be carefully 

 strained through a cloth or fine wire gauze. Kemember that all the spray 

 must come out through the small hole in the end of the nozzle ; therefore, 

 to avoid clogging, strain carefully before using. Care in the thorough 

 straining before spraying will pay for the trouble many times over. If 



