APPENDIX. 



COMPARISON OF THE THERMOMETKIC SCALES. 



The following rules will be found convenient for translating the degrees of 

 o.ie scale into those of another: 



1. To reduce Centigrade degrees to 

 those of Fahrenheit, multiply by 9, and 

 divide by 5, and to the quotient add 32 ; 

 that is, 



Cent.x9 +32 = Fahr 

 5 



2. To reduce Fahrenheit's degrees to 

 Centigrade : 



Fahr.-32x5 = Cent> 



