Proceeding's of the American Academy of Arts and Sciences. 

 Vol. XLII. No. 22. — Makch, 1907. 



CONTRIBUTIONS FROM THE JEFFERSON PHYSICAL 

 LABORATORY, HARVARD COLLEGE. 



OX TEE THOMSON EFFECT AND THE TEMPERA TUBE 

 COEFFICIENT OF THERMAL CONDUCTIVITY IN 

 SOFT IRON BETWEEN 115° AND 204° C 



By Edavix H. Hall, L. L. Campbell, S. B. Serviss, 

 AND E. P. Chukchill. 



IsvEsnoATioss ON Light and Heat made akd pcblished, ■wtiollt ob in paet, with Appbopbiatios 



FEOM THE RUMFORD FOND. 



