196 THE CONNECTICUT POMOLOGICAL SOCIETY. 



Rochester Machine Tool Works, Ltd., Rochester, N. Y. 

 Spraymotor Company, London, Ont., and Buffalo, N. Y. 

 Wallace Machinery Co., Champaign, 111. 

 Frost Insecticide Company, Arlington, Mass. 

 Niagara Sprayer Co., Middleport, N. Y. 

 H. L. Hurst Manufacturing Company, Canton, Ohio. 

 Thomas Peppier, Hightstown, N. J. 

 R. H. Deyo & Co., Binghamton, N. Y. 



Pumps and Accessories. 



All metal parts of the spraying equipment that come in 

 contact with the spray liquid should be made of brass, or some 

 other metal, that will not be affected by the chemicals. Iron 

 in any form should not be used unless covered with some 

 other metal. Neither should leather nor rubber valves be 

 employed. A closely fitting brass valve is used on the best 

 pumps. To facilitate taking a pump apart for cleaning nd 

 repairing, the working parts should be readily accessible. This 

 may be accomplished in various ways. Some pumps have 

 their working parts outside the tank, where they may be taken 

 apart with ease. Others have their cylinders within the tank 

 and must be detached from the latter before they can be taken 

 apart comfortably. The Hardie pump is of the latter class, 

 but it is supplied with a pair of clamps, making it very easily 

 detached from the tank. Pumps with their working parts 

 within the tank are usually lower and for use in the orchard 

 are not so liable to be in the way of branches. 



Pumps. There are several different types of pumps used 

 for spraying. The most common of these, and the one gen- 

 erally used on bucket and barrel outfits, is known as the sim- 

 ple-acting pump. Such a pump has but one set of ports or 

 valves. The cylinder is emptied and at the same time filled by 

 the upward stroke of the plunger. A modification of this 

 type, of which Gould's Standard is an example, is so arranged 

 that part of the contents of the cylinder is discharged by the 

 • upward stroke of the plunger and the rest by the return 

 stroke. Such a pump is not truly "double-acting," although 

 usually designated as such. The advantage of such pumps 



