35 



from 32 to 80 ; and from this Table II. has been con 

 structed as more convenient for general use : 



TABLE II. 



Rule. 



Let x height of mountain required. 



A=the mean height of the two barometers in inches. 



=the difference of the two. 



6 = the number in Table II. corresponding to the 



mean height of the two thermometers. 

 (Barometer at 30 inches.) 



in. 



30 ab 



