AIR BY WATER. 27 



Agitation had the fame effe<5t on old and frefli made 

 nitrous air. When both of them were reduced from ^^ 

 mcafures to about 2, they diminifhed a meafure of com- 

 mon air to 1.4. The agitation was continued ten mi- 

 nutes. 



D 2 No. 



