228 Animal Micrology 



THERMOMETERS 



To reduce degrees Fahrenheit to degrees Centigrade use the formula, 

 C=5/9 (F 32). For example, if the number of degrees Fahrenheit is 77, 

 then C=5/9 (77 32)=25 degrees. Or, for instance, to reduce 31 degrees 

 Fahrenheit to Centigrade, C=5/9(-31-32)=5/9x-63= -35 degrees. 



To reduce degrees of Centigrade to degrees of Fahrenheit use the 

 formula F=9/5 C-j-32. For example, if the number of degrees Centi- 

 grade is 25, then F=(9/5x25)+32=77 degrees. Or, to reduce -35 

 degrees Centigrade to Fahrenheit, F=(9/5x -35)+32=-31 degrees. 



