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

 Vol. XXXVIII. No. 25. — May, 1903. 



CONTRIBUTIONS FROM THE JEFFERSON PHYSICAL LABORATORY, 



HARVARD COLLEGE. 



THE SPECTRA OF GASES AND METALS AT HIGH 



TEMPERATURES. 



By John Trowbridge 



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



PROM the Rcmpord Fund. 



