Elastic Fluids to Di fusion. 563 



2. Two "4 ounce phials connected with the 

 10 inch small tube stood two days, having 

 common air and hydrogen gas. Upon ex^ 

 amination the upper was found to be 4 com- 

 mon air by the test of nitrous gas. The- gas in 

 the under exploded smartly ; that in the upper 

 moderately with a lambent flame. 



3. Two 1 ounce phials were connected by 

 the 10 inch tube, containing common air and 

 Jiydrogenous gas ; in 34- hours the upper was 

 about 4^ common air and the under 4 ; the 

 former exploded faintly ; the latter smartly. 



4. Two 1 ounce phials were connected as 

 above ; the under containing gas about 1- 

 oxygenous, the upper hydrogenous : In three 

 hours the latter was -J- oxygenous, and the 

 former about t; the upper exploded violently; 

 the under, moderately. 



5. Two 1 ounce phials were again con- 

 nected, the lower having atmospheric air, the 

 upper hydrogenous gas ; they stood fifteen 

 hours, and were then examined ; the upper 

 gave 1.67 with nitrous gas, the under 1.66. — 

 Hence it is evident that an equilibrium had 

 taken place, or the two gases were uniformly 

 diffused through each other in both phials. 



