42 Mr. Haldane Gee and Mr. Terry on 



In this .formula a graphic method of correction is 

 employed, or the formula 



maybe employed 



where C is the quantity to be added to the observed maximum 0, 



which is taken as that temperature after which the difference 



of the successive readings remains constant ; 

 V = rate of loss of temperature before the introduction of the hot 



body into the calorimeter, the mean temperature being /. 

 v = the corresponding quantity after the introduction of the hot 



body, and when the rate of cooling becomes constant, the 



mean temperature being /^ ; 

 do di 62 ' . . . 6n are the observed temperatures at the successive 



time intervals from the time of introducing the hot body to 



that of obtaining the maximum. 



II. Pape {Pogg. Ann.,CXX, p. 579, 1863) gives finally 

 in which 



^'~ Y-Ym-Ym\-,T^' 



and 



_ \0gVn-l0g'Vn+l 



Ai — ^ 



l0g6 



Ym = max temperature of Calorimeter. 

 Vi = initial „ „ 



V = temp. in heater. 



T = time reaching maximum temperature. 

 Si =-' sp. ht. of fluid in Calorimeter. 

 u^ and Vn+i being successive temperatures during 

 the period of regular cooling. 



or, in its most approximate form, using the notation of the 

 preceding formula, 



^ loge 



where C is the quantity to be added to the actually-observed 

 maximum attained in n time intervals ; whilst 6^ and d^rn+D 

 are successively observed temperatures in the period during 

 which the cooling is regular. 



