18 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



and that for normal solutions becomes 



^ = 0.000198 — . 

 dT "■ 



Since calcium and strontium are essentially like barium, and magnesium 

 is very similar to zinc, the following six metals may be taken as fair 

 samples of the behavior of various chlorides. 



COMPARISON OF THEORETICAL WITH THE ACTUAL TEMPERA- 

 TURE COEFFICIENTS. 



