Proceedings of the American Academy of Arts and Sciences. 

 Vol. XLI. No. 2. — May, 1905. 



CONTRIBUTIONS FROM THE JEFFERSON PHYSICAL LABORATORY, 

 HARVARD UNIVERSITY. 



MEASUREMENT OF VARIOUS THERMAL AND ELEC- 

 TRICAL EFFECTS, ESPECIALLY THE THOMSON 

 EFFECT IN SOFT IRON 



By Edwin H. Hall, Messrs. Churchill, Campbell, and Serviss. 



INVESTIGATIONS ON LIGHT AND IlEAT MADE OR PUBLISHED, WHOLLY OR IN PART, WITH APPROPRIATIONS 

 PROM THE RUMFORD FUND. 



