142 GYPS? AND BROWN-TAIL MOTHS. [Jan. 



Cost. 



1 team and driver, H days, ... $5 00 $7 50 



1 engineer, H days, " 2 80 4 20 



8 men, 1* days, -' 00 24 00 



780 pounds arsenate of lead, ... 11 So SO 



5 gallons gasoline, . 18 90 



( >il, waste, etc., . . 10 



Total, ... . . S122 50 



Average cost of treatment, $17.50 per acre, or 20.5 cents per tree. 

 Jvison was used at the rate of about 110 pounds per acre. 



MF.LROSE, JUNE, 1907. 



Mr. John J. Mc< 'nllough, local superintendent, supplied data con- 

 rerning the treatment <>!' an infested 6-acre wood lot. The trees, averag- 

 ing about 40 feet in height, had been thinned to stand 15 or 20 feet 

 apart, and the underbrush had been cut and burned. 



t 



Outfit. 



A 2 hoi-se-power Olds gasoline engine, connected with a double-acting 

 pump and 300-gallon spray tank, supplied 4 lines of 1^-inch hose 

 equipped with 10-foot extension rods and single Yermorel nozzles. 

 Four men and a foreman were required to operate this outfit, and 5 

 gallons of gasoline were consumed in the four days required to spray 

 the wood lot. About 25 per cent, of tlie trees were climbed. 



Cost. 



The data of cost of this work was not kept in quite as much detail 

 as in the cases previously described. Mr. McCullough's figures sho\v. 

 however, that the cost of arsenate of lead was $4 per acre, and the 



total cost of treatment averaged .sl2 per acre. 



MELRO^E. JTIA- 1, 1907. 



On a private estate in Melrose Highlands 2 shade trees about 40 f\vt 

 in hei'jht and 15 rose hushes were treated in one hour with an ordinary 

 barrel outfit, such as is commonly used on private estates. 



Outfit. 



A eoiiiiiimi hand pump, mounted in a 40-^allon barrel and carried 

 in an ex pi-ess wagon, furnished spray for a single line of ^-inch hose 

 and l'"i- Yennorel no/zle. 



Cost. 



2 men, $ day, . . . >_ i_v, so 56 

 1 horse, i day, . 1 50 19 

 .' pounds arsenate of lead, . r_> 24 



Tnlal, MI 99 



