Second Report on Potato Culture. 71 



saturated solution would soon be formed there, when no more of the 

 copper would be dissolved. If the barrel be covered tightly this stock 

 solution will keep good for an indefinite lengtli of time. 



The lime used should be fresh burned, caustic and not air slaked. 

 The most convenient receptacle in which to slake the lime i^ a some- 

 what shallow, long, water tight box To make up say lour barrels of 

 the Bordeaux mixture, put into this box 16 pounds of lime and add 

 sufficient water to thoroughly slake. The lime should be kept well 

 stirred during slaking that the water may come in contact with all 

 parts. If it is desired to keep the lime for some days after slaking, 

 it may be simply covered over with water so that the air will be 

 excluded. When it is desired to use it, stir thoroughly and put one 

 fourth the contents of the box into a keg or other receptacle and dilute 

 with 20 gallons of water. If more than four barrels of Bordeaux mix- 

 ture are likely to be wanted, two slaking boxes would better be pro- 

 vided so that the lime will be ready for use when required 



Into the barrel from which it is to be pumped put six gallons of the 

 contents of the barrel containing the dissolved copper sulfate. It 

 seems hardly necessary to state that before doing this the copper sulfate 

 solution should be thoroughly stirred. Fill the spray barrel half full 

 of water and add the lime which has been diluted with 20 gallons of 

 water. All of this material should be run through a sieve or strainer 

 so that no sediment will clog the action of the pump. 



If Paris green is to be used to kill the potato " bugs " put it in the 

 mixture at this time, four ounces if the grubs are small, six ounces if 

 they are half grown. A paste should be made of the Paris green by 

 mixing it with a small amount of water before putting it in the spray 

 barrel. Fill the barrel with water and the Bordeaux mixture is readv 

 for use to protect potatoes from the flea beetles, the blight and the 

 Colorado potato beetles. A strong force pump is best, as then every 

 part of the foliage can be covered by the liquid. During the opera- 

 tion of spraying the liquid should be frequently stirred, otherwise the 

 ingredients will not be evenly distributed through the- mixture. 



Numerous inquiries have been received not only from New York 

 state but from many states and foreign countries asking how the 

 success achieved by the station with potatoes was accomplished. 

 While the yield was fair, yet it was in no way remarkable, and was 

 not in excess of what should be realized by every potato raiser should 



