bri 
review over the ground we have traversed, and endeavor to see 
what light has been thrown upon the properties of titanium 
and whether the method of its detection, by fusion with bisul- 
phate of potash, as given in books, is all that could be desired, 
and whether it could not occasionally mislead the analyst. 
First, the properties of titanium. It was found that it would 
not precipitate readily in an acid solution on boiling. Phos- 
Arr. XXIX.— Contributions from the Sheffield Laboratory of Yale 
College. No. XXXI.—Eaperiments on the Decay of Nitrogen- 
ous Organic Substances; by H. P. ARMSBY, Ph.B. 
It has been shown by the investigations of Mulder (Chemis- 
element. This increase has generally been attributed to the 
Oxidation of free nitrogen to nitrous or nitric aci 
