ON THE ABSOLUTE EXPANSION OF MERCURY. 



27 



REGNAULT'S fourth series with the first three. This correction produces a much 

 larger deviation than tin- original discrepancy. It must he admitted, however, that a 

 deviation of the type assumed by BROCH was quite possible so far as the evidence of 



ooo^o 

 II 



> 



> 



ooota 



eqnoju. t 



Wall. 



Mon 



curve 

 cwrve 



300 



Fig. 8. 



the observations went. It is satisfactory to find that the error was not so serious as 

 lie supposed, and that the results of the present investigation are in such good general 

 agreement with REGNAULT'S work. 



E 2 



