124 BRIDGMAN. 



sion. We see that in this case the order followed is that of temperature. 

 II is stable at a higher temperature than I and has the greater expan- 

 sion, although it has the smaller volume. I is more expansible than 

 III, and II than III. 



The difference of compressibility of the several solids as given 

 directly by the difference of slopes was inappreciable. 



It is a pleasure to acknowledge generous assistance from the Bache 

 Fund of the National Academy, and from the Rumford Fund of the 

 American Academy of Arts and Sciences. 



The Jeffekson Physical Laboratory, 

 Harvard University, Cambridge, Mass. 



