A study of the mortar making qualities of Illinois sands . s ,the v/ei;_iht per cu. ft. lb., and the per- PIG. 27. oentage of voids • Sample I-To. 28. (Fig. 28.) This sand isfrom the Wabash River near Mt. Carmel. It isyellowish gray in color and contains some flint,granite and cinders. The sieve analysis (seePlate 24.) shows it to be almost as fine asSample No. 27. It is the finest and also thedirtiest river sand tested, there being ^^ PIG. 28. of suspended matter. The grains are all well rounded. The specific gravity is , the weight per cu. lb., and the percen

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A study of the mortar making qualities of Illinois sands . s ,the v/ei;_iht per cu. ft. lb., and the per- PIG. 27. oentage of voids • Sample I-To. 28. (Fig. 28.) This sand isfrom the Wabash River near Mt. Carmel. It isyellowish gray in color and contains some flint,granite and cinders. The sieve analysis (seePlate 24.) shows it to be almost as fine asSample No. 27. It is the finest and also thedirtiest river sand tested, there being ^^ PIG. 28. of suspended matter. The grains are all well rounded. The specific gravity is , the weight per cu. lb., and the percentage of voids • Sample No. 29. (Fig. 29.) This is abank sand from along the Little VermillionRiver above LaSalle. It is gray in color andis composed almost entirely of quartz, thegrains all being well rounded. The sieve anal-ysis (see Plate 29.) shows it to be very fine,^ passing the sieve and ^ the FIG. 29. There is ^ of suspended matter. Thespecific gravity is , the weight per cu. ft. lb., andthe voids ^..

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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1910