Proceedings of the American Academy of Arts and Sciences. 

 Vol. XXXIII. No. 18.— June, 1898. 



ON THE SOURCES OF LUMINOSITY IN THE 

 ELECTRIC ARC. 



By Henry Crew and Olin H. Basquin. 



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



FROii the Rujiford Fund. 



MARINE BIOLOGICAL LABORATORY. 



Received \Jw.AJ2t... J^J.%^ 



Accession No. I P.J/^.Z. 



Given by ><--<vr»rvC<^/... 1-^^ 

 Place, 



***flo book OP pamphlet is to be removed fpom the Liab- 

 jPQtopy taithout the pepmission of the Trustees. 



