8 
IOWA ACADEMY OF SCIENCE 
Executive Committee — Ex-officio: Samuel Calvin, F. F. Almy, S. W. Beyer, 
L. S. Ross, H. E. Summers. Elective: R. B. Wylie, L. Begeman, D. W. More- 
house. 
NAMES OF MEMBERS OF THE ACADEMY COUNCIL. 
M. F. Arey^ 
T. H. McBride, 
L. H. Pammel, 
F. M. Witter, 
T. E. Savage, 
C. O. Bates, 
A. Marston, 
Maurice Ricker, 
H. E. Summers, 
N. Knight, 
A. A. Bennett, 
H. W. Norris, 
L. S. Ross, 
F. F. Almy, 
W. H. Norton, 
S. W. Beyer, 
B. Shimek 
G. E. Finch, 
R. B. Wylie, 
S. Calvin, 
C. C. Nutting, 
E. W. Stanton, 
G. L. Houser, 
L. Begeman, 
W. S. Hendrixson, 
A. C. Page, 
J. L. Tilton, 
A. W. Martin. 
NAMES OF FELLOWS AND MEMBERS PRESENT AT THE TWENTY- 
SECOND SESSION. 
F. F. Almy, 
A. A. Bennett, 
S. F. Hersey, 
C. C. Nutting, 
A. G. Smith 
Guy W. Wilson, 
M. F. Arey, 
E. J. Cable, 
E. A. Jenner, 
A. C. Page, 
S. W. Stookey, 
B. H. Baily, 
S. Calvin, 
G. F. Kay, 
L. H. Pammel, 
C. E. Bartholomew, 
E. K. C^iapman, 
C. N. Kinney, 
E. W. Rockwood^ 
J. L. Tilton, 
C. O. Bates, 
G. E. Crawford, 
D. W. Morehouse, 
L. S. Ross, 
G. W. Walters, 
L. Begeman. 
K. E. Guthe, 
G. W. Newton, 
B. Shimek, 
G. G. Wheat. 
PROGRAM OF THE IOWA ACADEMY OF SCIENCE. 
The president’s address by Professor John L. Tilton and the lecture on “Old 
and New Theories of the Formation of the Earth,” by Professor Moulton, were 
given at the Auditorium Friday evening. Reception to members of the Academy 
at the residence of President Seerley, after the lecture. 
Review of Solar Observations Made at Alta, Iowa, During the Past Five Years. . . . 
David B. Hadden 
The Vitality of Weed Seeds Under Different Conditions of Treatment and a Study 
of Their Dormant Periods H. S. Fawcett 
Some Seeds of the Genus Pyrus L. H. Pammel 
The Genesis of the Loess, a Problem in Plant Ecology B. Shimek 
A Hybrid Oak .* B. Shimek 
Notes on Peronosporales for 1907 Guy West Wilson 
A Key to the Families of Ferns and Flowering Plants of Washington T. C. Frye 
The Forestry Problem of the Prairies of the Middle West Hugh P. Baker 
Notes on the Routine Diphtheria Determination in the Laboratory L. S. Ross 
Isolation of Diphtheria Bacilli from Serous Fluid of a Cadaver L. S. Ross 
The Uric Acid Ferments E. W. Rockwood 
The Determination of Ferrous Iron Nicholas Knight 
The Decomposition of Dolomite Nicholas Knight 
The Analysis of Some Iowa Waters Nicholas Knight 
The Life of Portland Cement G. G. Wheat 
The Loess of the Paha and the River-Ridge B. Shimek 
Some Peculiarities in the Elastic Properties of Certain Metals K. E. Guthe 
An Experimental Deterjnination of the Charge of an Electron by Wilson’s Method, 
Using Radium L. Begeman 
Nucleation According to Barus L. Begeman 
Evaporation from Water Surfaces Exposed to the Sun A. G. Smith 
The Protpzoa of Payette, Iowa Guy West Wilson 
