14 
IOWA ACADEMY OP SCIENCES. 
of physics, Iowa State Normal; David E. Hadden, Alta, astronomer; J. H. 
O’Donoghue, Storm Lake, superintendent schools; T. E. Savage, Iowa City, 
assistant in botany. State University, former member; H. E Summers, 
Ames, professor of zoology, State College of Agriculture; H. F. Wickham, 
Iowa City, assistant professor of zoology. State University. 
MEMBERS. 
P. E. Adams, Durham; Dr. Walter Bierring, Iowa City; D. K. Bond, 
Rockwell City; F. W. Bouska, Ames; James E. Gow, Greenfield; H. H. 
Hume, Ames; P. W. Jenkins, Indianola; P. E. Lenocher, Panora; Her- 
man Mueller, Iowa City; A. Estella Paddock, Whitten; A. P. Sample, Ames; 
D. H. Talbot, Sioux City; L. R. Walker, Clermont; Ira A.. Williams, Ames. 
The secretary was instructed to let each author see his own proof so far 
as might be possible. 
The following officers were elected for 1899 : 
President— . S. Hendrixson. 
First Vice-President— yi . F. Arey. 
Second Vice-President — F. M, Witter. 
Secretary-Treasurer — H. P. Bain. 
Elective Members of the Executive Council — S. W. Beyer, W. H. Norton, 
A. C Page. 
In general sessions the following papers were read in full or by title: 
* Herbert Osborn— Observations on Hemiptera. 
** J. H. O’DONOGHUE-Gas Analysis. 
**Launcelot W. Andrews— On a New Method for the Quantitative 
Determination of the Water Present in Concentrated Sulphuric Acid. 
* Maurice Ricker— The August Cloud-burst in Des Moines County. 
**N. M. VOLDENG — Cell-formation and Cell-life. 
* L. S. Ross— A Simple Incubator. 
* James E. Gow— F orest Trees of Adair County. 
* James E. Gow — Effect of Sleet Storm. 
* Francis M. Fultz — The Burlington Artesian Well. 
*C. C. Nutting— The Colors of Deep-sea Animals. 
*P. M. Witter — Observations on the Geology of Steamboat Springs, 
Colorado. 
X Charles R. Keyes — Cuesta Topography of the Crimean Peninsula. 
1 Charles R. Keyes— Permian Series of Eastern Russia. 
* Charles R. Keyes — Some Physical Aspects of General Geological Cor- 
relation. 
*S. W. Beyer — Buried Loess at Ames, Iowa. 
*** H. Foster Bain — Notes on the Drift of Northwestern Iowa. The extra- 
morainic drift of Northwestern Iowa has many peculiar characteris- 
tics and its age is in doubt. It has been provisionally correlated 
with the Iowan, but this seems now quite certainly wrong. There is 
an anomalous phase of the Kansan, as well as typical drift of that 
formation, in the region, and this has contributed to the confusion. 
The conditions governing the development of ferretto are discussed. 
* Frank Leverett — The Lower^Rapids of the Mississippi River. 
* Published in this volume. 
** Read by title. No copy furnished for publication. 
*** Published in the American Geologist. 
$ Read by title. Abstract furnished. 
