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A. D. 19L2. 



This spraying machine (PL IX, fig. 1) is composed of a large iron 

 tank, fitted with a pressure gauge (!), an inlet pipe with a strong 

 screw cap (£) which is opened with a large wrench (-?), an outlet pipe 

 with cut-off (4) and connected through a pressure-reducing valve (-5) 

 with a laige air bottle (6*). (A large carbonic-acid gas bottle serves 

 this purpose, the larger the better.) This machine is fastened onto 

 a truck made from two old mower wheels and an iron shoe. 



Provided that the spray material is thoroughly screened so that 

 no dirt gets in to clog the nozzles, this machine is effective and is - 

 small and light that it is readily hauled through a hopyard by one 

 - 



The air bottles are filled with air compressed by the air comp: 

 to 1.000 or 13K) pounds (PL IX, fig. 2), loaded onto the supply wagon, 

 and hauled with the spray to the field. The spray tank is filled, an 

 air bottle connected with the reducing valve which has been set for 

 120 or more pounds pressure, the air is turned on. the pressure gauge 

 indicates the pressure that is maintained, and the machine is ready 

 for work. 



The following information was received from Mr. Eder and gi 

 data from which the cost of such a machine may be estimated : 



Replying to your request in this regard, we beg to advise that the cost of these rigs 

 depends upon the size of the spray tank, etc A 1-50-galkm tank in black iron would 

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 tank cost $10. including pressure gauges and fittings. Mowing machine wheels we 

 buy old, costing from $1 to $1.-50 per pair. The axles and other iron work on the truck 

 cost in the Deighborhood of $8, and the woodwork, etc., would probably bring the 

 entire truck construction up to $15. The only things you would now have to add are 

 spray hose. pipe, and nozzles, which expense would, of course, vary according to the 

 number of leads and the length of same. We usually use four leads, two of 16 feet and 

 two of 25 fee?. We use seven-ply finch hose, costing about 12 cents per foot, and use 

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 mately 90 cents. The value of the pipe and valve would probably be $1. The sir 

 bottles, if pu r c hased in lots, cost $12; singly, probably $15. 



For further information we beg to advise that a crew of four spray hands will empty 

 a 250-gaUon spray tank on hops about five to six tunes a day. and this would require 



