Proceedings of the American Academy of Arts and Sciences. 

 Vol. XLII. No. i;3. — November, 1906. 



FL UOBESCENCE A ND BIA GNETIC EOT A TION SPECTRA 

 OF SODIUM VAFOIL AND THEIR ANALYSIS. 



By R. W. Wood. 



With Five Plates. 



Investigations on Light and Heat made and published, whollt or m fabt, with Apphopeiation 



FROM THE RUMFOBD FUND. 



