•  
  •  
 

Volume 21, Annual Issue (1914)

Front Matter

General Interest Articles

PDF

Memorial Note on Seth Eugene Meek p. 11-16
Charles Keyes

Research

PDF

Sulfofication in Soils p. 17-22
P. E. Brown and E. H. Kellogg

PDF

Notes on a Fossil Tree-Fern of Iowa p. 59-65
Clifford H. Farr

PDF

Notes on the Ecology of Iowa Lichens p. 67-75
Zoe R. Frazier

PDF

Sunflecks p. 101-107
W. H. Davis

PDF

Weed Survey of Story County, Iowa p. 115-118
L. H. Pammel and Charlotte M. King

PDF

Unusual Dolomites p. 127-128
Nicholas Knight

PDF

The Sand of Sylvan Beach, New York p. 129-130
Nicholas Knight

PDF

Equilibrium in the System: Mercuric Iodine and Anilin p. 161-169
E. J. Fry and J. N. Pearce

PDF

Our Pre-Cambrian Rocks p. 195-202
Charles Keyes

PDF

On the Occurence of Precious Stones in the Drift p. 203-204
Garrett A. Muilenburg

PDF

The Formation of Eskers p. 211-218
Arthur C. Trowbridge

PDF

The Coleoptera of Henry County, Iowa p. 317-340
Inez N. King

PDF

The Butterflies of Woodbury County p. 341-346
A. W. Lindsey