22 
We can, then, confirm the results of Bayliss, 
Hurwitz and Rous and Wilson with chloride 
infusion; our experience supplements these in 
showing that, in so far as the bromide, nitrate 
and thiocyanate of sodium are concerned, the 
use of them in infusions after severe hemor- 
rhage would probably be of little permanent 
value in maintaining normal blood volume. 
Furthermore, it is probable that employment 
of sodium sulfate, even in combination with 
colloidal substances, will prove little more 
efficacious than Ringer’s solution. 
Artuur H. SMITH 
YALE UNIVERSITY 
THE IOWA ACADEMY OF SCIENCE 
TuE Towa Academy of Science held its thirty- 
second annual session at the Lowa State College at 
Ames, beginning at 1:30 p.m. on Friday, April 26. 
After the general program in the Assembly Room 
sectional meetings were held for the reading of 
papers of special interest and these were resumed 
on Saturday morning. The general business meet- 
ing was held on Saturday morning at 11 o’elock. 
Dean E. A. Birge, of the University of Wisconsin, 
gave the annual address at 8 p.m. Friday, on ‘‘The 
warming of an inland lake.’’ The Iowa Section of 
the Mathematical Association of America and the 
Ames and Iowa Sections of the American Chemical 
Society held their meetings in connection with the 
sessions of the Academy. President Ross delivered 
his presidential address on ‘‘The history of the 
teaching of science’’ at the general meeting on 
Friday afternoon. 
At the business meeting on Saturday morning 
the following officers were chosen for the coming 
year: 
President—S. W. Beyer, State College, Ames. 
First Vice-president—T. C. Stephens, Morning- 
side College, Sioux City. 
Second Vice-president—R. Monroe McKenzie, 
Parsons College, Fairfield. 
Secretary—James H. Lees, Iowa Geological Sur- 
vey. 
Treasurer—A. O. Thomas, State University, lowa 
City. 
Resolutions were passed endorsing the national 
administration, also calling for the selection of 
scientifically trained men to the position of fish 
and game warden and on the Board of Conserva- 
tion. 
SCIENCE 
N.S. Vou. XLVIII. No. 1227 
TITLES OF PAPERS 
Physics and Psychology 
Temperature-time relations in canned foods dur- 
ing sterilization: Grorce E. THOMPSON. Certain 
well-known mathematical formule are applied to 
heat penetration into foods packed in cylindrical 
cans. It is found that if the diffusivity of the 
food be known the temperature-time curves may 
be constructed with a fair degree of accuracy for 
cans of any size and for any practical tempera- 
ture range. A number of experimental and theo- 
retical curves are shown for squash and corn. 
(a) Some structural features of selenium de- 
posited by condensation from the vapor state above 
the melting point. (b) The sublimation curve 
for selenium crystals of the hexagonal system: L. 
EH. Dopp. 
Stroboscopic velocities in the tonoscope: H. R. 
FossLerR AND L. E. Dopp. 
The eclipse expedition to Matheson, Colorado, 
June 8, 1918: D. W. MorEHOUsE. 
The X-ray spectrum of tungsten: O. B. OvERN. 
A new principle in the design of rheostats of 
large capacity: H. L. Dopex. ; 
On the coefficient of absorption of photoelec- 
trons in silver and platinum: OTTo STUHLMANN, 
JR. 
On the production of opaque- and the color of 
transparent and semitransparent metallic films: 
Orro STUHLMANN, JR. 
Hall effects in thin silver films: G. R. Warr. 
The effect of pressure upon the conductivity of 
selenium: HE. O. DIETERICH. 
The measurement of basic capacities im motor 
ability: Cart E. SrasHors. The speaker reported 
having devised and standardized a series of seven 
tests for the measurement of the basic forms of 
motor capacity. These are (1) motor ability, (2) 
timed action, (3) a simple response to a simple 
signal, (4) a simple response to a complex signal, 
(5) a complex response to a complex signal, (6) 
precision in action—direction, time, distance and 
force, and (7) strength and endurance. 
He also reported haying devised simplified forms 
of instruments for these measurements. The time 
measurements are all made by means of small at- 
tachments, used on a phonograph. The complex 
reaction to a complex stimulus (chain reaction) is 
made by means of a carrier contact to a type- 
writer; and the strength and endurance test is 
made by means of a new form of ergograph, taxing 
the muscles of the forearm. 
