FARM ARITHMETIC PROBLEMS 101 



13. To find the number of pounds of butter fat in 

 in milk. Take the test per cent of the number of 

 pounds of milk. For instance, if milk tests 4 per 

 cent, 50 pounds of milk will contain 2 pounds of 

 butter fat. 



Spraying Mixtures 

 FOE BITING INSECTS 



DRY PARIS GREEN WET PARIS GREEN. 



Paris green 1 Ib. Paris green ^4 Ik- 

 Lime or Lime *4 to y 2 Ib. 



flour ...20 to 50 Ibs. Water 50 gals. 



FOR SOFT-BODIED SUCKING INSECTS 

 KEROSENE EMULSION 



Hard soap (in fine shavings) y 2 Ib. 



Water 1 gal. 



Kerosene 2 gals. 



Dissolve soap in boiling water, add kerosene to the 

 hot water, churn with spraying pump until the mix- 

 ture changes to a creamy, then to a soft, butter- 

 like mass. This gives three gallons of 66 per cent 

 oil emulsion which may be diluted to the strength 



