The following analyses were made several years ago for Mr. E. P. Boynton, the city engineer of Cedar Rapids. The clays were taken from four companies in Des Moines; each having their plant in a different part of that city.
Proceedings of the Iowa Academy of Sciences
© Copyright 1901 by the Iowa Academy of Science, Inc.
Bates, C. O.
"Analyses of Certain Clays Used for Making Paving Brick for Cedar Rapids,"
Proceedings of the Iowa Academy of Science, 9(1), 61-63.
Available at: https://scholarworks.uni.edu/pias/vol9/iss1/10