THE 
SCIENTIFIC PROCEEDINGS 
OF THE 
ROYAL DUBLIN SOCIETY. 
Vol, XI. (N.8.), No. 8. MAY, 1906. 
ON ENTOPTIC VISION. 
[PARTS II. ann ITI.] 
BY 
W. F. BARRETT, F.B.S., 
PROFESSOR OF EXPERIMENTAL PHYSICS, ROYAL COLLEGE OF SOIENCE 
FOR IRELAND. 
(PLATES III. & IV.) 
[Authors alone are responsible for all opinions expressed in their Communications. | 
DUBLIN: 
PUBLISHED BY THE ROYAL DUBLIN SOCIETY, 
WILLIAMS AND NORGATE, 
14, HENRIETTA-STREET, COVENT GARDEN, LONDON, W.C. 
1906. 
Price One Shilling. 
