The relative turbidity of the permanent colloidal suspensions from the different strata have been measured by means of a specially constructed tyndallmeter. The amount of clay which can be held in water suspension has been found to depend upon the stratum from which the clay was obtained, upon the hydrogen ion concentration, and upon the concentration of the electrolyte present in the suspension. In so far as the work has proceeded, we have found that the turbidity attainable is greater for the oxidized and leached strata than for the gumbotil; furthermore, for any one stratum, the maximum permanent turbidity is greater in the Kansan than in the Nebraskan.
Proceedings of the Iowa Academy of Science
©1927 Iowa Academy of Science, Inc.
Graham, Hoyt C. and Pearce, J. N.
"The Influence of Hydrogen Ion Concentration and Electrolytes upon the Turbidity, Sensitivity and Settling Rates of Certain Pleistocene Clays,"
Proceedings of the Iowa Academy of Science, 34(34), 217-218.
Available at: https://scholarworks.uni.edu/pias/vol34/iss1/44