Proceedings of the American Academy of Arts and Sciences. 

 Vol. XLI. No. 21. —February, 1906. 



CONTRIBUTIONS FROM THE CHEMICAL LABORATORY 

 OF HARVARD COLLEGE. 



A NEW METHOD OF STANDARDIZING THERMOMETERS, 



BELOW 0° C. 



By Theodore W. Richards and Frederick G. Jackson. 



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



FROM THE RUMPORD FOND. 



