Proceedings of the American Academy of Arts and Sciences. 

 Vol. XXXVI. No. 2. — June, 1900. 



ON THE THERMAL DIFFUSIVITIES OF DIFFERENT 



KINDS OF MARBLE. 



By B. O. Peiuce anb R. W. Willson. 



INVESTIGATIOKS ON LiGHT AND UeAT MADE AND PUBIISHED WHOLLY OR IN PARI WITH APPROPRLiTIONS 



FROM THE RUMFORD FUND. 



