GENERAL MEETiNG. 25 
continents would be so far different that all the existing resem- 
blances would disappear... The pointed extremities of some conti- 
nents are merely expressions of the fact that mountain chains are 
more or less linear, and do not hold the same height throughout 
their whole extent. 
Mr. G. E. Curtis read a paper on 
THE RELATIONS BETWEEN NORTHERS AND MAGNETIC DISTURB- 
ANCES AT HAVANA, 
upon which remarks were made by Messrs. ABBE and COFFIN. 
[It will be published by the Army Signal Office as Signal Service 
Note No. XIII.] 
Mr. GiLBERT recurred to the subject of Mr. Russell’s paper of 
the preceding meeting, and dissented from the view advanced by 
Mr. Antisell in regard to the origin of pumice. Mr. ANTISELL 
announced that he would discuss the matter more fully at some 
future meeting. 
250TH MEETING. Marcu 29, 1884. 
Vice-President MALLERY in the Chair. 
Forty-two members present. : 
The Chair announced the election to membership of Messrs. 
Basit Norris and WILLIAM STEBBINS BARNARD. 
Mr. J. S. Bruurnes spoke briefly on 
COMPOSITE PHOTOGRAPHY APPLIED TO CRANIOLOGY, 
exhibiting several composite photographs of skulls. Adult male 
skulls of the same race were selected for composition and were 
photographed in sets of from 7 to 18—front, side, and back views 
being separately taken. The composition was directly from the 
skulls and not from the photographs, 
Incidental mention was made of the uncertainty of measure- 
ments of cranial capacity by means of shot. Not only did differ- 
