INTRODUCTION. 



The following tables of Specific Heat for Solids and Liquids are 

 believed to be practically complete up to October, 1875. Of course it 

 was not considered necessary to include much very old material, there 

 being little of value prior to the time of Dulong and Petit. Un- 

 doubtedly the oldest determinations have a certain historical value, but 

 this would be hardly sufficient to warrant the labor involved in search- 

 ing them out. However, quite a number of such determinations have 

 been included in the tables, notably some by Dalton, Crawford, Gadolin, 

 and Lavoisier and Laplace. 



For convenience, the columns of atomic or molecular heats have 

 been added. These values, it is hardly necessary to say, are the pro- 

 ducts obtained by multiplying the specific heat of a substance into its 

 atomic or molecular weight. For this purpose the most recent deter- 

 minations of atomic weight have been employed. 



Details concerning the methods of determination could not well be 

 given in such tables as these. For such details the original papers must 

 be consulted, and to these original papers references are. almost always 



supplied. 



F. W. C. 

 Cincinnati, Jan. 5, 1876. 



