APPENDIX O 



COMPARISON OF FAHRENHEIT AND CENTIGRADE 

 THERMOMETER SCALES 



To change Centigrade to Fahrenheit : (C. x f ) + 32 = F. For example, to 

 find the equivalent of 10 C., (10 x g) + 32 = 50 F. 



To change Fahrenheit to Centigrade : (F. 32) x $ = C. For example, to 

 reduce 50 F. to Centigrade, (50 32) x f = 10 C ; and 40 F. to Centigrade, 

 (_ 40 _ 32) = - 72, whence - 72 x f = - 40 C. 



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