48 



K. IKEDA. 



A — x 



In this case the volume of air diminished gradually, and the 

 chemical action at time â was proportional not to A —x, but to 

 so that 



dx , A-~x , A—x 

 K = k- 



dä V v^)—x 



or M& = ^^^f^dx = (l + ^^f^)dx 



A—x \ A—x / 



which on integration between o and x gives 



Here it is, of course, necessary to employ the natural logarithms. 



As the last column in the foregoing table shows, -Y\x + iVo—A)\og 

 —^ [ is practically constant with the exception of the first two 



A — X J 



numbers. This deviation allows of several explanations and suggests 

 various further experiments ; but speculations had better be omitted, 

 especially since there is but the single experiment recorded above to 

 go upon. Still it would be highly interesting to see what influence 

 various diluents have on the velocity of the oxidation, especially as 

 some gases are said to retard the action greatly. 



The Chemical Laboratory of the 



Higher Normal School, Tokyo. 

 August, 1892. 



