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<br />. <br /> <br />. <br /> <br />- 2 - <br /> <br />5. Deposit near Westcliffe, Colorado. (No. 547-1). <br />6. McAlpin ranch prospect near Red Wing, Colorado <br />1No.546-l). <br />Bentonite or clay deposits in other areas of Colorado <br />that have been sampled include: <br />1. Brick clay prospects near Marshall, Colorado (between <br />Golden and Boulder). <br />2. Vandleman prospect near Fort Collins, Colorado <br />(No. 541-1). <br />3. Wyble-Drum prospect near Wellington, Colorado (No. <br />531-1, 2, 3). <br />4. Rump pit near Grand Junction, Colorado (Nos. 542-1, <br />543-1). <br />5. 5chrader prospect near Fort Morgan, Colorado (No. <br />536-1, 2). <br /> <br />TE5TlNG <br /> <br />The initial results of testing of Colorado clays com- <br />pleted under this program are tabulated in Table I. In general, <br />a grit content of less than 10 per cent and a colloidal yield <br />of more than 30 per cent is considered favorable. However, <br />additional evaluation tests are needed to fully evaluate a <br />clay sample. These additional evaluation tests are being <br />developed. <br /> <br />1017 <br />