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The Oesper Collections in the History of Chemistry, University of Cincinnati
Notes from the Oesper Collections


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Commercial valence block models for use in the lecture hall based on a peg and hole locking mechanism and interchangeable cardboard labels.
Commercial valence block models for use in the lecture hall based on a peg and hole locking mechanism and interchangeable cardboard labels.

Issue 56 describes an unusual type of chemical model known as a valence block that was once used to teach introductory chemistry and which also appeared in chemistry sets in the period 1940-1960.

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These occasional notes highlight items and topics of interest in the Oesper Collections in the History of Chemistry. For more information please contact Editor/Curator: Dr. William B. Jensen, Oesper Professor of Chemical Education and History of Chemistry, University of Cincinnati.

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Latest Issue:
Valence Blocks : Notes from the Oesper Collections, No.56, May/June 2019
Issue 56 describes an unusual type of chemical model known as a valence block that was once used to teach introductory chemistry and which also appeared in chemistry sets in the period 1940-1960.

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