44 



Mr. Haldane Gee and Mr. Terry 



on 



8 





21-80 = 618 



9 





21-80 = 0^ = 09 



10 



21-79 



14 





21-71 



18 





21-62 



20 





21-58 



23 





21-50 = 0^ 



24 





21-48 = 0^+, 



26 





21-44 



Hence vi= -021 



Substituting these values in Pfaundler's formula we get, 

 after simplifying, 



•021 



C = ' 



4-65 



(l70-2 



+ 19-4-152-7' 



■') 



whence 



C=-17, 



and substituting the above figures for the corresponding 



letters in Pape's formula we get 



log21-50-log21-48 



C = ?i0- 



loge 



whence 



C = -18 



and by Schuster's formula we get 



C = -18. 



We may here remark that this formula may be much 



simplified for our purpose by using the form 



~ AT 

 as the rest of the formula generally only affects the third 

 place of decimals. 



If now we take -2° as the value of C, putting this value 

 into Regnault's equation, we get in the above example 



299-2 + 4-3 . (21-8 + -2) -16-97 -75 



X — — 



38-7 



99 -(21 -8 + -2) 38-7 



x = 



•5123 



- -0194 



= 



-493 





