Proceedings of the American Academy of Arts and Sciences. 

 Vol. XXXVIII. No. 15. — December, 1902. 



CONTRIBUTIONS FROM THE CHEMICAL LABORATORY 

 OF HARVARD COLLEGE. 



THE TRANSITION TEMPERATURE OF SODIC SUL- 

 PHATE REFERRED ANEW TO THE 

 INTERNATIONAL STANDARD. 



By Theodore William Richards and Roger Clark Wells. 



Investigations on Light and Heat, made and published wholly or in part with Appropriations 



from the rumford fond. 



