Excerpt from Out of Door Studies in Geography: The Making of the Surface and Soils of the Upper Mississippi Region
The matter contained in this little book has been prepared with the thought of bringing within the grasp of grammar school pupils some knowledge of the origin of rocks and soils, and of the sculpturing of the earths surface, which has usually been left for more advanced classes. The writer believes that knowledge concerning the facts presented should be much more common than it is.
As far as possible, difficult, scientific terms and phrases are avoided and those names employed which are in most common use. Definite localities are taken for study in order to intensify interest and furnish real types for comparison.
Acknowledgments are due to a number of persons for the loan of photographs. Proper credit is given with each illustration. However, I desire to express special obligations to Prof. W.W. Atwood, of the University of Chicago; Prof. C.W. Hall, of the University of Minnesota; Prof. Charles F.Curtiss and Prof. Samuel W.Beyer, of the Iowa State College of Agriculture and Mechanic Arts; Prof. Samuel Calvin, of the Iowa State University, and Prof. W.H. Norton, of Cornell College.
That so many of the illustrations are from my own photographs is due to my many years of interest and study in the general subject and to having been privileged to make extensive field observations.
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