Proceedings of the American Academy of Arts and Sciences. 

 Vol. XXXVI. No. 14.— January, 1901. 



FALSE SPECTRA FROM THE ROWLAND CONCAVE 



GRATLNG, 



By Theodore Lyman, Ph.D. 



With a Plate. 



Investigations on Light and Heat made and published wholly or d; part with Appropriations 



. FROM the RuMFORD FUND. 



