Bulletin of the Museum of Comparative Zoology 

 AT HARVARD COLLEGE. 



Vol. LIII. No. 5. 



THE REACTIONS OF AMPHIBIANS TO MONOCHROMATIC 

 LIGHTS OF EQUAL INTENSITY. 



By Henry Laurens. 



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



PRINTED FOR THE MUSEUM. 



June, 1911. 



