26 PHILOSOPHICAL SOCIETY OF WASHINGTON. 
ent observers obtain widely different determinations from the same 
skull, but the same observer was not able to obtainrclosely approxi- 
mate results in successive determinations. 
Mr. G. Brown GoopE made a communication on 
FISHERIES EXHIBITIONS, 
giving a list of all international exhibitions and describing es- 
pecially those of Berlin (1880) and London (1883). The adminis- 
trative systems of these two national exhibits were contrasted, and 
the social and economic results of the London exhibit were ex- 
plained. [The substance of the paper will be published in the ex- 
ecutive report on the London and Berlin exhibitions. ] 
Mr. M. H. DoortrrLeE began a communication on 
MUSIC AND THE CHEMICAL ELEMENTS, 
but was unable to complete it before the hour for adjournment. 
The remaining portion was postponed until the next meeting. 
By unanimous consent adjournment was deferred for a few 
minutes in order to afford Mr. Antisell an opportunity to reply to 
a criticism made at the previous meeting in regard to his views on 
. the origin of pumice. 
251st MBErTING. APRIL 12, 1884, 
The President in the Chair. 
Forty-one members and guests present. 
Announcement was made of the election to membership of 
James ARRAN Maner, Joun BeLtknap Marcou, Joun MILton 
Grercory, Francis Trrrany Bow es, and Witit1AmM EIMBECK. 
