01521cam a22003011  4500001001300000003000400013005001700017008004100034010001700075035001900092040002400111050001600135051003200151082001200183100004200195245043100237260002500668300004800693490007200741500013300813500015300946504002401099650001001123650001001133700003401143700002501177999001701202gs 41000011 DLC20260227111346.0780909s1940    ilua     b   s000 0 eng    ags 41000011   a(OCoLC)4209290  aDLCcUUdOCoLCdDLC00aTN941b.G77  aQE105b.A25 no. 69cCopy 2.  a552/.521 aGrim, Ralph E.q(Ralph Early),d1902-14a(1) Elements of the petrographic study of bonding clays and of the clay substance of molding sandsc[by] Ralph E. Grim. (2) Mineral composition and texture of clay substance of natural molding sands [by] Ralph E. Grim and Carl E. Schubert. (3) The relationship between the physical and mineralogical characteristics of bonding clays [by] Ralph E. Grim and Richards A. Rowland ... Printed by authority of the state of Illinois.  aUrbana, Ill.,c1940.  a32 p. incl. illus., tables, diagrs.c25 cm.0 aIllinois. State geological survey. Report of investigationsvno. 69  aAt head of title: State of Illinois ... Department of registration and education ... Division of the State geological survey ...  a"Reprinted from the Transactions of the American foundrymen's association, vol. 47, no. 4, pp. 895-908, 935-953; vol. 48, no. 1, pp. 211-224, 1940."  aBibliography: p.32. 0aClay. 0aSand.1 aSchubert, Carl Edward,d1899-1 aRowland, Richards A.  c27686d27686