THE RELATION OF SPECIFIC HEAT TO ATOMIC WEIGHT. 
43 
This, however, takes no account of the sulphur in the compounds, and though the 
molecular heat of each may be calculated and the mean atomic heats of the Wo 
metals so obtained, the result is of little value without a knowledg’e of the rate at 
which the specific heat of sulphur increases with temperature. 
In conclusion, I desire again to acknoAvledge the skilful assistance of Mr. Sidney 
Young in tlie exjieriments. I have also to thank Mr. Leonaud Eaihstow, Whit. 
Sell., for valuable help in the calculations. 
