INSECT PESTS OF OHIO SHADE AND FOREST TREES 195 



machines to be used of the one kind, since experience has taught 

 that many advantages accrue from such a plan. The possibihty of 

 interchange of parts and the maintaining of a stock supply of parts 

 most liable to give way; the lack of confusion in the operation of 

 the various machines when it becomes necessary to shift the work- 

 men; and the chance to secure a low purchase figure by reason of 

 buying in quantity, all these are features which indicate the desir- 

 ability of the plan. 



SPRAYING EQUIPMENT ACCESSORIES 



The accessory equipment of a municipal sprayer is almost as 

 important as the machine itself. Frequently the work is held up, 

 precious time is lost, and wage outlays are wasted for the lack of 

 some minor item of equipment which, if available, might prevent or 

 right any trouble arising in the work. Frequently a machine is 

 tied up several hours while someone makes a long trip across the 

 city to get some tool to make an adjustment. Similarly the lack of 

 proper protection for the men and horses makes for inefficiency 

 and poor results. 



A generous tool kit. — A tool kit should accompany each sprayer, 

 with sufficient equipment to make any necessary adjustment on the 

 machine, indeed, so that minor repairs may be made afield. Extra 

 parts of the sprayer, recognized as likely to need replacing, should 

 be carried along. Among these might be enumerated plunger cups 

 and packing, extra nozzles and cut-offs and one or two extra lengths 

 of hose. 



Covers for horses. — Canvas or other waterproof material 

 should cover the horses to protect them from the blowing and drift- 

 ing spray. A city street with nearby tall buildings is filled with 

 variable wind currents, and it is not always possible to keep the 

 team and sprayer out of the falling spray. While no very serious 

 harm is likely to follow a moderate amount of exposure to this con- 

 dition, the hair may be roughened and made unsightly, and the 

 harness becomes stained and unattractive. The comfort of the 

 animals should also be considered. If protected, they are not so 

 likely to become nervous and cause trouble. 



Clothing for workmen. — All the workmen of a spraying gang 

 should be suitably clothed for the work. Waterproof hats and coats 

 may be worn, and the hands should be protected by leather gloves. 

 The coat should extend below the knees, and preferably should be 

 of material of moderate weight so as not to interfere too greatly 

 with the freedom of the wearer. It need not be absolutely water- 

 proof, since the wearer rarely encounters drenching spray and cloth 



