i2 PHILOSOPHICAL SOCIETY OF WASHINGTON. 
Mr. J. 8S. Briurgs criticised the plans at length and advocated 
that which has been adopted for the indexing of the Library of 
the Army Medical Museum. 
Other remarks were made by Messrs. ANTISELL, Norris, GOODE, 
E. Farquuar, F. W. CLARKE, Harkness, TONER and WARD. 
The meeting announced for October 11 was informally ad- 
journed, to enable members to attend a meeting of the Anthropo- 
logical Society, and listen to an address by Dr. E. B. Tylor, of 
Oxford, England. 
256TH MEETING. OcToBER 25, 1884, 
The President in the Chair. 
Forty members and guests present. 
The Chair announced the death, since the last meeting, of Dr. 
JOSEPH JANVIER WoopwWaRD, a former President of the Society, 
Gen. ORVILLE Extas Bascock, and Gen. BENJAMIN ALVORD. 
Announcement was also made of the election to membership 
of Messrs. WASHINGTON MarrHews, STiMson JOSEPH Brown, 
TARLETON HorrMaNn BEAN, and Ropert Epwarp EARLL. 
Mr. S. M. Burnerr read a paper entitled— 
ARE THERE SEPARATE CENTRES FOR LIGHT-, FORM-, AND 
COLOR-PERCEPTION ? 
controverting the theory which gives an affirmative answer to 
the question, and maintaining, first, that there is no white-light 
sensation that cannot be resolved into its constituent elements of 
color sensation; and, second, that the sense of form is an expres- 
sion of the idea of extension as represented by the dimensions 
of the area of the retina impressed. The idea of form is not 
a purely visual sensation, but is based also on information derived 
from other sources. 
[The paper is published in the Archives of Medicime, Vol. XII, 
No. 2, October, 1884. ] 
