198 BOARD OF AGRICULTURE. [Pub. Doc. 



appear at the same time, it has become the practice to combine 

 Paris green and the Bordeaux mixture, so that one-half of 

 the cost of application is saved ; and, as the lime in this mixt- 

 ure neutralizes the free arsenious acid, should there be any, 

 more of this insecticide can be used, thus making the 

 destruction of insect pests more certain. 



Spraying Pumps. 



For the application of fungicides and insecticides there are 

 manufactured in various sections many kinds of pumps, of 

 greater or less perfection of construction. A pump to be 

 satisfactory must be one that will throw a steady stream 

 with considerable force, and yet work with ease. Such 

 pumps are manufactured by W. & B. Douglas of Middle- 

 town, Conn., the Field Force Pump Company, Lockport, 

 N. Y., and numerous other parties in different parts of the 

 country, most of whom are making good pumps, but which of 

 them is the best is difficult for any one to determine. The 

 value of a pump of any of the various makes often depends 

 very largely upon the manipulator. A complicated piece of 

 mechanism requires a mechanic to run it properly and keep 

 it in good working order, and the best machine ever made 

 may soon be rendered useless in the hands of a bungler. 



"We have here on exhibition from W. & B. Douglas and 

 the Field Force Pump Company several forms of pumps. 

 The knapsack pump is very serviceable for small gardens, 

 small trees and closely planted crops, where a team cannot 

 1)6 driven ; but the cost is against its general use. The 

 Imrrel pump or the power pump is much more economical 

 of time and labor, where a large amount of spraying is to be 

 done. The settling of the solid parts of the Bordeaux mixt- 

 ure and the Paris green has been one of the difficulties met 

 with in ordinary spraying, and we are glad to note that the 

 appliances for automatically stirring the mixtures have been 

 attached to the newer forms of both the knapsack and the 

 barrel pump. 



In discussing the subject of insecticides and fungicides we 

 cover a very large field, and in order to include all of the 

 important fungous diseases and destructive insects I shall be 

 obliged to take them up in groups, considering both the 



