Analyses of several clays from a brickyard at Indianola have recently been made by me to go into a report of the Geological Survey of Warren County. Though it has been said that a knowledge of the constituents of a clay, determined by a purely chemical analysis, is of very little value to a practical brickmaker, yet in comparing the analyses of these clays and those from other vicinities, it seems that points of great value to the manufacturer are made plain, and points that can be derived from no other source. So I wish to give a few ideas which came to me as I made the comparison, as points, of local interest at least, were, it seems to me, clearly brought out.
Proceedings of the Iowa Academy of Sciences
©1895 Iowa Academy of Science, Inc.
Youtz, L. A.
"Clays of the Indianola Brick, Tile and Pottery Works,"
Proceedings of the Iowa Academy of Science, 3(1), 40-44.
Available at: https://scholarworks.uni.edu/pias/vol3/iss1/10