68 
IOWA ACADEMY OF SCIENCE 
more complete treatment of the same subject in Volume XIX under the titles: 
Coal Deposits of Iowa by Henry Hinds; Fuel Values of low'a Coals by Frank 
A. Wilder; Analyses of Iowa Coals, James H. Lees and A. W. Hixson; History 
of Coal Mining in Iowa, Lees; Coal Statistics, Beyer; General Section of the 
Des Moines Stage of Iowa, Lees; The Carboniferous Section of S. W. Iowa, 
Geo. L. Smith; and the Bibliography of Iowa Coal, Lees. The same volume 
very properly also contained papers on Peat and Peat Deposits in Iowa by Beyer, 
and the Flora of Northern Iowa Peat Bogs by Pammel. These two volumes 
and extended details in the county reports of counties within thfe coal producing 
area constitute a very generous scientific and practical presentation of this 
most interesting and important subject. 
The third volume, 1893, presented a variety of topics, several of which were 
of immediate economic value while several were chiefly of scientific interest. 
They were as follows: W^ork and Scope of the Geological Survey, Keyes; 
Gypsum Deposits of Iowa, Keyes; Clay Industries of Western Iowa, Lonsdale; 
Certain Building Stones, Beyer; Thickness of the Palaeozoic Formations in 
Northeastern Iowa, Norton; Carboniferous and Devonian Outliers in Iowa, 
Norton; Glacial markings in Southwestern Iowa, Fultz; Cretaceous Rocks of 
the Sioux river, Bain; the Zinc Industry, Leonard. These topics^were treated 
necessarily in a preliminary way and have received fuller consideration in 
later volumes in most instances, but they served to get before the public 
promptly much valuable information and quickened and increased the interest 
in further investigation. 
Volume VI., dealt with Lead and Zinc Deposits in Iowa, Leonard; Sioux 
Quartzites and Certain Associated Rocks, Beyer; Artesian Wells of Iowa; Nor- 
ton; Relations of the Wisconsin & Kansan Drift Sheets in Central Iowa and 
Related Phenomena, Bain. 
Volume VIII., contains, besides County Reports, an article by Bain on Prop- 
erties and Tests of Iowa Building Stones. 
Volume IX., is devoted to County Reports, but also includes an account of the 
Artesian Wells of the Belle Plain Area by H. R. Mosnat. 
In Volume X., Stuart Weller discusses the Fossil Fauna of the Kinderhook 
Beds of Burlington. The rest of the volume is given to County Reports. 
Besides the County Reports, Volume XIII., has a very valuable report on the 
Lithographic Stone of Mitchell County by A. B. Hoen. 
Volume XIV., is given up to the interests of the Clay Industry in a series 
of six articles as follows: Technology of Clay, Beyer and Williams; Chemistry 
of Clays, Weems; Selection and Installation of Power Plants, G. W. Bissell; 
Geology of Clays, Beyer and Williams; Tests of Clay Products, Marston; Direc- 
tory of Clay Workers, Beyer and Williams. 
Volume XV., is devoted mainly to county reports, but it also presents a very 
practical report on Cement and Cement Materials in Iowa by E. C. Eckel and 
H. F. Bain. 
Volume XVH., considers economic subjects only. They are: Quarry Products 
of Iowa, Beyer, William and Bissel; Analyses of Iowa Coals, Limestones, 
Chalks, Clays, Shales and Marls, Tests of Iowa Building Stones, by Marston. 
Volume XVHI., is unique in the series and one of the most hotable. It is of 
purely scientific interest and is wholly given to the consideration of Devonian 
Fishes of Iowa by Dr. Charles R. Eastman. It is a well nigh exhaustive mono- 
