258 



Testing Milk and Its Products. 



Table XIV. Comparisons of thermometer scales ( Continued. ) 



To convert deg. Fahrenheit to corresponding deg. Centigrade: 

 Subtract 32, multiply difference by 5, and divide by 9. 

 Example: Which degree Centigrade corresponds to 110 F.? 110 32 = 



78; 78 X 5 = 390; 390 -i- 9 = 43.33. 



To convert deg. Centigrade to corresponding deg. Fahrenheit: 

 Multiply by 9, divide product by 5, and add 32 to quotient. 

 Example: Which degree Fahrenheit corresponds to 95.5 C.? 95.5 X 9 = 



859.5; 869.5 -H 5 = 171.9; 171.9 + 32 = 203.6. 



