4^6 Appendix, 



only, on the surface of silver that has absorbed oxygen, the whole 

 of the oxygen will immediately be taken from it ; no ebullition or 

 escape of gas occurs, whether it be cooled gradually, as in speci- 

 men No. 4, or when poured into water as in No. 5.' . . . 



Page 274 (note). I found this gas to contain 86 or 87 per 

 cent, of oxygen. — J. D. 



