An investigation of the silica deposits of southern Illinois . vity was checked by determining the true specificby the picnometer method. These results were found to check within whichwas within the limits of error of the experiment. This is consistent with theresults obtained by Ross^. Results of check upon the specific gravity determin-ations are as follows:- Trial Piece No. 167 168 81 True specific gravity Picnometer Method Apparent Specific Gravity Curves were plotted from the average results obtained. These shov/ theeffect of temperature upon the
An investigation of the silica deposits of southern Illinois . vity was checked by determining the true specificby the picnometer method. These results were found to check within whichwas within the limits of error of the experiment. This is consistent with theresults obtained by Ross^. Results of check upon the specific gravity determin-ations are as follows:- Trial Piece No. 167 168 81 True specific gravity Picnometer Method Apparent Specific Gravity Curves were plotted from the average results obtained. These shov/ theeffect of temperature upon the rate of inversion for each binder. The curvescombined as is shown on the following pages, shov/s the effect of the bindersupon the rate of inversion. The partial curves and those lacking are due to thedisintegration of the trial pieces when immersed in water and subjected to boil-ing in v/ater under reduced pressure. The results used were the averages of thetwo trials that checked within Those with greater variation were not usedin plotting the
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectminesandmineralresou
