Proceedings 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 



TEMPERA TURES. 



By Johx Trowbridge 



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



FROM the Romford Fond. 



