43-11 



Proceedings of the American Academy of Arts and Sciences. 

 Vol. XLIII. No. 11. — November, 1907. 



DIFFERENCE IN WA VE-LENGTHS OF TITANIUM 

 AA 3900 AND 8918 IN ABC AND SPARK. 



By Norton A. Kent and Alfred H. Avery. 



Investigations on Lioht and Heat made and published, wholly ok in part, with Appropriation 



from the kumford fund. 



