22 NEW YORK STATE MUSEUM 



kindly supplied the following data. The elms on the college 

 campus at New Brunswick are 50 to 75 feet high and were 

 sprayed at odd times by the janitors, it requiring about an hour 

 for two with force pump, tank and ladders to treat one tree. The 

 poison necessary for each spraying was worth about six cents. 

 It will thus be seen that the cost per tree would be between 36 

 and 56 cents, varying with the price of labor. In the city of 

 New Brunswick th^ trees were sprayed at a contract price of one 

 dollar for the season, the understanding being that they were to 

 receive three treatments if necessary. The contractor prepared 

 the outfit, furnished the material, did the spraying at the price^ 

 mentioned and had a neat margin remaining. 



Mr Kirkland, Assistant state entomologist of Massachusetts, 

 has kindly supplied me with the following figures. A grove of 

 over 200 red and white oaks ranging in height from 40 to 70 feet 

 were sprayed once at an expense of 49 cents per tree. In this^ 

 instance arsenate of lead was used at the rate of 20 lbs to 150 

 gallons of water, a considerably stronger mixture than would be 

 necessary for the larvae of the elm-leaf beetle. In addition, he 

 estimated the expense of spraying smaller trees, 20 to 40 feet 

 high, at 15 to 20 cents per tree. 



The cost of spraying the elms in Albany this season, aside 

 from wear and tear of the apparatus, is considerably less than 

 the figures above given. The trees present a wide range in size, 

 although the majority are from 50 to about 70 feet in height. 

 Taking them as they come, Mr Lewis has succeeded in spraying 

 them once at the low cost of about 15 cents per tree. This is 

 largely due to the excellent apparatus, to be described later, and 

 is a most encouraging feature of the work. It is hoped that 

 these figures will induce private individuals to provide protection 

 for their trees, either by doing the spraying themselves or else 

 by hiring some capable party. 



Proper apparatus. In order to do this work successfully 

 one must possess a force pump capable of throwing a stream some 

 distance, a number of feet of hose and a nozzle that will dis- 

 charge a rather fine spray. There must also be something to 



