Il"^ 



Bulletin of the Museum of Comparative Zoology 

 AT HARVARD COLLEGE, 

 Vol. LXI. No. 15. 



THE HARVARD DEEP-SEA THERMOGRAPH. 



By Harry Clark. 



With Five Plates. 



CAMBRIDGE, MASS., U. S. A.: 



PRINTED FOR THE MUSEUM. 



March, 1918. 



