XIV INTRODUCTION. 



The formula for conversion is 



C°=|(F°-32 ) 



where F° is a given temperature Fahrenheit, and C° the corresponding 

 temperature Centigrade. 



Example : 



To convert 79°7 Fahrenheit to Centigrade. 

 The table gives directly 26°50 C. 



For conversions of temperatures outside the limits of the table use 

 Table i. 



Table 3. Conversion of readings of the Centigrade thermometer to readings 

 Fahrenheit. 



The conversion of Centigrade temperatures to Fahrenheit temperatures 

 is given for every tenth of a degree Centigrade from + 60.9 to — 90.9 C. 

 The tabular values are expressed in hundredths of a degree Fahrenheit. 



The formula for conversion is 



F° = I C° + 32 



where C° is a given temperature Centigrade, and F° the correspondirg 

 temperature Fahrenheit. 



For conversions of temperatures outside the limits of the table, use 

 Table 1 or 4. 



Table 4. Conversion of readings of the Centigrade thermometer near the 

 boiling point to readings Fahrenheit. 



This is an extension of Table 3 from 90^0 to ioo°9 Centigrade. 



Example: 



To convert 9574 Centigrade to Fahrenheit. 



From the table, 95°7Q C. = 20^.26 F. 



By interpolation, 0.04 = 0.07 



9574 C. = 204^3 F. 



Table 5. Conversion of differences Fahrenheit to differences Centigrade. 



The table gives for every tenth of a degree from o° to 209 F. the 

 corresponding lengths of the Centigrade scale. 



