Bulletin of the Museum of Comparative Zodlogy 
AT HARVARD COLLEGE. 
Vou. LI... 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. 
