INSECTS, FUNGI, PLANT DISEASES, ETC. 185 



viz.: that these fungicides and insecticides are not cura- 

 tives of the disease, but are simply preventatives, so the 

 spraying must be done at the proper times in order to 

 reach the cause of the trouble before it is too deeply 

 rooted in the tissues of the plant. Secure the best labor 

 for this work, and use the best machines procurable. 



The Kerowater. — The demand for a sprayer that will 

 unite the kerosene oil and water when needed, and at 

 the moment that the two come from the machine, has 

 induced the Gould Manufacturing Company of Seneca 

 Falls, New York, to devise the " Kerowater," which in 

 many respects is a handy and convenient sprayer. The 

 kerosene oil is placed in the oil tank located within the 

 barrel, which is clearly indicated in the figure. The water 

 is placed in the barrel. Each tank has its own pump, and 

 the two fluids do not come together until they reach the 

 discharge pipe, and the proportion of kerosene oil is main- 

 tained at the will of the operator. The use of this and 

 similar machines obviates the necessity of preparing the 

 emulsion beforehand. 



