CIENCE 
SSS] 
Fripay, Apri 5, 1912 
CONTENTS 
The Proceedings at the Centenary of the 
Academy of Natural Sciences of Philadel- 
phia 517 
The Misuse of Lantern Illustrations by Mu- 
seum Lecturers: Dr. C. H. TOWNSEND .... 529 
Ralph Stockman Tarr 
Charles ROVEL WSQWGET aie) -- oi) -\- lao aie) 2110) ole 
Scientific Notes and News 
University and Educational News .......... 
Discussion and Correspondence :— 
Principles of Water-power Development: 
Dr. W J McGer. Dr. Radosavijevich’s 
““Critique’’ of Professor Boas: DR. ROBERT 
H. Lowiz. Report of the Seal Commission: 
GORGE) VAN CUARK Es epi) oe cielevelelelotele elsieieie 536 
Quotations :— 
Lord Lister and Westminster Abbey ...... 541 
Scientific Books :— 
Soddy’s Chemistry of the Radio-elements: 
Proressor B. B. Bottwoop. Bryan on 
Stability in Aviation: Dr. W. J. Hum- 
PHREYS. Pilsbry on Non-marine Mollusca 
of Patagonia: Proressor T. D. A. Cock- 
ERELL 542 
Special Articles :-— 
The Upper Eocene Titanotheroid Telma- 
therium (?) inciswwum Douglass from the 
Uinta Basin: PROFESSOR WILLIAM K. 
GREGORY. Oi Concentration about Salt 
Domes: PROFESSOR G. D. Harris 546 
The American Association for the Advance- 
ment of Science :— 
Section D: G. W. BISSELL .............. 547 
Societies and Academies :— 
The Helminthological Society of Washing- 
ton: Maurice C. Hatt. The Academy of 
Science of St. Louis: PROFESSOR GEORGE 
MN WON 6 oslo doacggoduonnoonduAodeoosaG 
MSS. intended for publication and books, etc., intonded for 
review should be sent to the Editor of Scrmncz, Garrison-on- 
Hudson, N, Y, 
THE PROCEEDINGS AT THE CENTENARY 
OF THE ACADEMY OF NATURAL 
SCIENCES OF PHILADELPHIA 
AN adequate celebration of the one 
hundredth anniversary of the academy was 
urged by the academy secretary early in 
February, 1911, and was entrusted to a gen- 
eral committee of forty-three. The cele- 
bration thus provided for extended over 
three days: the 19th, 20th and 21st of 
March. It began on the 19th because that 
was the stated meeting night of the acad- 
emy, the 21st being the actual date of the 
anniversary. The lecture hall on the even- 
ing of the 19th was well filled with people, 
the front seats being occupied by delegates, 
who, to the number of one hundred and 
forty-seven, had been appointed by cor- 
responding societies at home and abroad. 
The president of the academy, the Hon- 
orable Samuel Gibson Dixon, M.D., LL.D., 
took the chair promptly at 8 P.M., and in- 
troduced the Honorable Rudolph Blank- 
enburg, mayor of Philadelphia, who, in a 
few well-chosen words, cordially welcomed 
the visiting scientists to the city. The 
recording secretary, Edward J. Nolan, 
M.D., then requested the delegates, as the 
names of the societies they represented 
were called by the corresponding secretary, 
J. Perey Moore, Ph.D., to arise, bow, and 
hand their letters of credential and con- 
eratulation to the president without read- 
ing. As the exercises of the evening were 
likely to be lengthy, he asked that any re- 
marks considered desirable should be very 
brief. Thus warned, as a matter of fact, 
no one spoke, and as much the greater num- 
ber of the two hundred and eighty-six 
letters received from all parts of the world 
