SCIENCE 
Frmpay, Fesruary 9, 1912 
CONTENTS 
The Measure of a Singer: PROFESSOR CARL 
BE. SEASHORE ......-...---e-se-ee- sees 201 
The American School Hygiene Association .. 212 
The Rockefeller Foundation .............++ 213 
Scientific Notes and News ............-+-- 213 
University and Educational News .......... 215 
Discussion and Correspondence :— 
The Formation of Clouds over Fires: Wat- 
Tek N. Lacy. Endocrypta huntsmani: C. 
MCLEAN FRASER ............00 eee eueee 215 
Scientific Books :— 
Howard on the House Fly: PRoFESSOR JOHN 
B. SmirH. Jongmans’s Die Paleobotantsche 
Literatur: Dr. EDwarp W. BERRY ....... 
Scientific Journals and Articles 
Notes on Entomology: Dr. NATHAN BANKS . 217 
Special Articles:— — 
A New Genus of Rhinoceros from the Lower 
Miocene: HaRoLD JAMES COOK 
The American Association for the Advance- 
ment of Science:— 
Section A—Mathematics and Astronomy: 
Proresson G. A. MILLER ............... 
The Association of American Geographers: 
PROFESSOR ALBERT PERRY BRIGHAM ...... 
The Society of American Bacteriologists: 
Dr. CHARLES EH. MarSHALL 
MSS. intended for publication and books, etc., intonded for 
Teview should be sent to the Editor of Scimncr, Garrison-on- 
Hudson, N, Y. 
THE MEASURE OF A SINGER* 
THE historian of the future will prob- 
ably characterize the period upon which we 
are now entering in psychology as the 
period of the rise of the applied psycho- 
logical sciences. It may, therefore, be meet 
and proper to take some fundamental con- 
cept of applied psychology as topic for this 
annual address. I select for this purpose 
the rdle of mental measurement—the 
possibility, the scope and the meaning of 
mental measurements as the foundation of 
applied mental sciences. 
In order to illustrate the scope and sig- 
nificance of mental measurement in a con- 
erete and specific instance, I shall make 
bold to present a psychological outline of 
the measurement of an individual as a 
singer. Let us make the assumption that 
this individual is a girl, fifteen years of 
age, who has had musical training and 
now desires the best obtainable advice from 
a consulting psychologist in music in regard 
to her future prospects as a singer. 
Musical power is generally admitted to 
embrace certain well-recognized and fairly 
conerete capacities. In our commonplace 
judgment about ourselves and others we 
say: ‘‘I have no ear for music.’’ ‘‘I can 
not tell a chord from a discord.’’ ‘‘I can 
not keep time.’’ ‘‘I have no sense of 
rhythm.’’ ‘‘I can not tell a two-step from 
a waltz.’’ ‘‘I can not remember music.’’ 
“‘T ean not image sounds.’’ ‘‘I am not 
moved by music.’’ ‘‘I do not enjoy 
music.’’ Or, if speaking of some one who 
has musical ability, we say: ‘‘He has a 
1The annual address before the American Psy- 
chological Association, Washington, D. C., Decem- 
ber, 1911. 
