210 Report oF THE DEPARTMENT OF ENTOMOLOGY OF THE 
THE WASHES AND THEIR PREPARATION. | 
The washes used in this experiment were the lime-sulphur- 
salt wash, prepared with and without external heat; the lime- 
sulphur wash; and the lime-sulphur-caustic soda wash, prepared 
with and without external heat. Their formule and methods of 
preparation are as follows: 
Bortep LIME-SuLPHUR-SALT WASH. 
(Formula TI.) 
OTE eit viet ws vie Boo Els mar sangen a pe eu aa ee eeeh ee 15 pounds. 
STEM PME a8 fei cdonss s, cid is oss shene ales a a UR eet Reo ere ee 15 pounds. 
SH) iE cee ee Re ar entrar rr A re TAL 15 pounds. 
WVBR releases is esis cin \ie a) ofS sys, ial sus miley Salata nary Cate 50 gallons. 
This was prepared in the usual method by first slaking the 
lime to a thin whitewash and then adding the sulphur and the 
salt. These ingredients were distributed thoroughly in the white- 
wash and the mixture boiled from one to two hours. 
SevLr-Bortep LiMe-SuLPHUR-SALT WASH. 
(Formula IT.) 
E101) US ee en eee ROL PRON ERE NE SEE Tey PR era Po PO Sreccsh 40 pounds. 
PPL PONE a tc ters oi Jaye sc ¥) Sas ats ins anh, adie as he eee ee 20 pounds. 
PSU ie teen itear shad» ekaich Sfallctey pegcnialte ee eee cps toe alae ee 15 pounds. 
WV cs 0% Sarare suc, anit a Rio nicre ose’ saekogs) AUS bce wen 60 gallons. 
This wash was cooked without the direct use of external heat. 
First, the sulphur was made into a paste with hot water and was 
then emptied into a barrel containing 40 pounds of lime, which 
was started to slake with 12 gallons of boiling water. During 
the slaking process, the barrel was covered to prevent the loss 
of heat. Occasionally the wash was stirred to secure a more 
uniform distribution of the sulphur in the whitewash. In 20 
minutes after the time that the lime first commenced to slake, 
enough boiling water was, added to make the required 60 gallons 
of mixture; after which the salt was added and stirred until 
dissolved. The wash was then strained and applied hot. 
