Liebig and Combustion Analysis : Notes from the Oesper Collections, No. 40, September/October 2016

Justus von Liebig (1803-1873) posing with his apparatus for combustion analysis.
Justus von Liebig (1803-1873) posing with his apparatus for combustion analysis.

Issue 40 outlines the history and importance of the chemical technique known as combustion analysis and highlights a reproduction of Liebig’s famous 1831 instrument for this purpose made by the late Dr. Melvyn Usselman of the University of Western Ontario and donated to our museum collections in 2005.

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The Steelyard Balance : Notes from the Oesper Collections, No. 39, July/August 2016

A recently acquired 19th-century Chinese steelyard or so-called “opium balance” with an 11” ivory beam and accompanying “teardrop” storage case
A recently acquired 19th-century Chinese steelyard or so-called “opium balance” with an 11” ivory beam and accompanying “teardrop” storage case

Issue 39 briefly outlines the history and principles underlying traditional single pan or “steelyard” balances and illustrates their evolution using examples from our museum collections.

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The Case of the Wandering Model : Notes from the Oesper Collections, No. 35, November/December 2015

Hans Jaffé (1919-1989)
Hans Jaffé (1919-1989)

Issue 35 recounts the recent discovery of a plaster model of the electron density of naphthalene discovered in the bottom drawer of one of the filing cabinets belonging to the late Hans Jaffé, who served as the UC chemistry department’s specialist in quantum mechanics from 1954-1989.

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Oesper News: 3 New Museum Booklets are Now Available

Dr. William B. Jensen has added three new Museum Booklets to the series on the history of chemical apparatus.   These new titles are:

  • Classic Voltaic Cells
  • Electrolysis Cells
  • Classical Molecular Weight Determinations

Each booklet contains several photos and illustrations of the chemical instruments and people involved in these aspects of chemistry history. You can access all the booklets by clicking here.

 

The Youden pH Meter : Notes from the Oesper Collections, No. 33, July/August 2015

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.

Click here for all other issues of Notes from The Oesper Collections and to explore the Jensen-Thomas Apparatus Collection.

Countercurrent Distribution Once Again : Notes from the Oesper Collections, No. 32, May/June 2015

The circa 1949 Craig cylindrical countercurrent distribution apparatus recently donated to the Oesper Collections by Dr. Edward Bennett (Jensen-Thomas Apparatus Collection).
The circa 1949 Craig cylindrical countercurrent
distribution apparatus recently donated to the Oesper Collections by Dr. Edward Bennett (Jensen-Thomas Apparatus Collection).

Issue 32 describes the recent acquisition of an even earlier version of a Craig countercurrent distribution apparatus than the version that was described in issue 3 of 2010.

Click here for all other issues of Notes from The Oesper Collections and to explore the Jensen-Thomas Apparatus Collection.