44 NEW YORK STATE MUSEUM 



department of public parks of the city of New York. This is the form used 

 in Albany. The whole outfit is represented on plate 21. It consists of a 

 Daimler gasoline motor operating a Gould force pump. The motor and 

 pump, weighing but 300 pounds, can be placed in the bottom of a spring 

 wagon along with the 100 gallon tank containing the poisonous mi.xture. 

 This motor has the advantage of being almost noiseless in operation and is 

 scarcely noticed by passing horses. It is very inexpensive to operate, as a 

 gallon of gasoline is sufificient for a day, and it requires so little attention 

 that a tyro can run it. The smallest size Gould three-piston pump is the 

 one used with the motor, though Dr Southwick now recommends a larger 

 one in order to utilize the power more fully. A complete power spraying 

 outfit, aside from horse and wagon, should not cost over $500, the price 

 naturally varying with market conditions and quality of materials used. 

 Four lines of hose can easily lie supplied, though in most places in Albany 

 not more than two can be used to advantage. 



Some other apparatus in addition to that usually supplied with spraying 

 outfits is necessary. Several ladders or some convenient arrangement for 

 getting up into trees is almost essential unless the spraying wagon has one 

 of the elevating platforms such as are used by electric car companies on 

 repair outfits. Two powgr spraying outfits constructed for the village of 

 Saratoga in 1899 were provided with these elevating towers and they were 

 found to be very effective and economical. The cost of spraying for the 

 forest tent caterpillar which, by the way, need not be done so carefully as 

 for the elm leaf beetle, was but i7'4c a tree, and considerable of this saving 

 was attributed to the elevating towers. In this instance 5667 large maple 

 trees were sprayed and practically all in the village were treated, thus enab- 

 ling the operators to save time in every possible manner. 



Hand collecting, etc. Hand collecting appears very slow, laborious, 

 and not at all adapted to present conditions. This is true in a great many 

 instances and yet there are cases where hand picking is one of the most eco- 

 nomical methods of controlling certain injurious species. The white marked 

 tussock moth, Hemerocampa leucostigma Abb. & Sm., is a form 



