Proceedings of the American Academy of Arts and Sciences. 

 Vol. XLVII. No. 5. — July, 1911. 



CONTRIBUTIONS FROM THE CHEMICAL LABORATORY 

 OF HARVARD COLLEGE. 



THE TRANSITION TEMPERATURES OF SODIUM 



CHROMATE AS CONVENIENT FIXED 



POINTS IN THERMOMETRY, 



By Theodore W. Richards and George Leslie Kelley. 



Investigations on Light and Heat published with Aid fbom the Rumford Fund. 



