188 



The Spraying of Plants. 



without removing it from the back, is also made by the same 

 manufacturer. 



The Japy pump (Fig. 7) is very like the preceding, but the pis- 

 ton rod is worked by a lever situated within the tank, the lever 

 in turn being moved by a rod extending through the top of the 

 reservoir. Both the cylinder and the air chamber project below 

 the tank. For plans of an improved Japy pump, designed by 

 B. T. Galloway, see Journal of Mycology, Vol. vii. No. 1, 39. 



I 



FIG. 7. The "Japy" knapsack pump. Fio. 8. The "Albrand" knapsack purap. 



The Albrand (Fig. 8), manufactured by Valloton, Lyons, 

 France, is provided with an air pump situated on one side of 

 the tank, near the top. Air is forced into the reservoir, the 

 outlet of the conducting tube being near the bottom, thus 

 agitating the liquid. The pressure of the air within the tank 

 forces out the liquid. 



B. T. Galloway, of the United States Department of Agricul- 

 ture, was the first in this country to publish detailed plans for 

 the construction of knapsack pumps. 1 His recommendations 

 have been followed more or less closely to the present time, but 



1 Journal of Mycology, Vol. vi. 1890, Sept. 10, pp. 26 and 51. 



