On the Atomic Weight of Glucinum. 



17 



Appendix 0. 



Details of Specific Heat Determinations. 



I. Specific Heat of Turpentine. 



(i.) By Method of Mixture with Magnesium. 



(a.) Specific Heat of Magnesium. 



w— weight of substance, w r = weight of platinum wire as support, 

 W= weight of water ; water- equivalent of calorimeter, agitator, and 

 thermometer =2*84, T= temperature of substance, t= initial tempera- 

 ture of liquid, 9— final temperature of mixture, c= calculated specific 

 heat. [Specific heat of water at t°=l + 0-Q003£] 



Expt. 1.. w = 4739, w' = 0-156, W = 85-21, 



T = 99°-61, 9 = 12°-57, t = 11°*41 

 .-. ci = 0-2474. 



Expt. 2.. W= 85-22, T = 99°-96, 9 = ll°-38, t = 10°-21 

 .-. c 2 = 0-2452. 



Expt. 3.. W= 85-22, T = 98°-80, = 12°-79, * = ll°-65 

 .-. c 3 = 0-2428. 



Expt. 4.. W= 85-22, T = 98°'78, 9 = 13°'78, t = 12°-66 

 c 4 = 0-2412. 



Mean : c^ = 0'2442. 



(b.) Specific Heat of Turpentine. 



w and to' as before. W= weight of turpentine, equivalent of calori- 

 meter, &C.=:2'83. 



Expt. 1.. W= 75-80, T = 98°-20, 9 = 14°-57, t = ll°-67, 

 .-. c l = 0-4111. 



Expt. 2.. W= 75-17, T = 99°-54, = 15°-27, t = 12°-47, 

 .-. c 2 = 0-4274. 



Expt. 3.. W= 75-12, T = 98°-20, = 14°-60, * = 11°74, 

 .-. c 3 = 0-4206. 



Expt. 4.. W= 75-43, T = 97°'95, 9 = 12°-97, £ = 10°-03, 

 c 4 = 0-4140. 



Expt. 5.. W= 75-02, T = 97°-98, 9 = 13°-58, t = 10°-64, 

 .-. c 5 = 0-4131. 



VOL. XXXIX. C 



