(1) Elements of the petrographic study of bonding clays and of the clay substance of molding sands [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.

By: Contributor(s): Material type: TextTextSeries: Illinois. State geological survey. Report of investigations ; no. 69Publication details: Urbana, Ill., 1940.Description: 32 p. incl. illus., tables, diagrs. 25 cmSubject(s): DDC classification:
  • 552/.52
LOC classification:
  • TN941 .G77
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At head of title: State of Illinois ... Department of registration and education ... Division of the State geological survey ...

"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."

Bibliography: p.32.

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