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


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Our recently acquired Youden null-point pH meter. The Moir electrode system, minus one of the salt bridges, is to the left and a circa 1940 bottle of quinhydrone is displayed between it and the meter.

Our recently acquired Youden null-point pH meter. The Moir electrode system, minus one of the salt bridges, is to the left and a circa 1940 bottle of quinhydrone is displayed between it and the meter.

Issue 33 describes a recently acquired compact pH meter from the 1940s that uses a quinhydrone electrode, rather than either a hydrogen electrode or a standard glass electrode.

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This site highlights the Oesper Collections in the History of Chemistry, which are a joint venture of the Ralph E. Oesper Chemistry-Biology Library of the University of Cincinnati and of the Department of Chemistry of the University of Cincinnati.  The collections consist of three components: The Apparatus Museum, the rare Books and Journals collection, and the historical Portraits and Prints collection.  Each of these may be separately accessed either by selecting the appropriate tab or by clicking on the various highlighted links.  The origins of the collections may be accessed by selecting the link for History and the origins of this website by selecting the link for Credits.

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