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Physics at the University of Toronto: A History in Objects

A remarkable variety of teaching and research has taken place within the field of physics at the University of Toronto since the first physics laboratory was established in the University College building  in 1878. One way of recording and representing this history is through objects, typically collected by researchers and staff, that have survived to the present day. 

Examining the objects in this display case will give you an overall sense of major landmarks in the history of this department. However, objects, like any kind of historical document, often survive haphazardly and can only tell an incomplete story. We keep what we feel is important at a given moment, but our values change with time, and so do the kinds of stories that we consider important. Consider, for instance, the lack of artifacts associated with the relatively few women researchers and teachers from the Department’s early history.

Out of necessity, most scientific equipment is simply discarded, and it them the material evidence of countless hours of work and ingenuity. We can’t keep everything, but we ought to keep a representative sample of what’s important. Properly researched and documented, a minor artifact like a piece of apparatus or a prepared sample can preserve the memory of a major research project. You will find a few such examples here. 

It is important that students and researchers contribute to the stories being told. If you know of any objects or stories that ought to be kept and documented, or any stories that ought to have been told here, let us know.

Exhibit Themes

A black-and-white composite image showing side-by-side portraits of James Loudon and Rudolph Koenig. Sources for these images are given in the "Bibliography" section that is linked in the theme page.

James Loudon and Rudolph Koenig: Protagonists of the Brass and Glass Era

The first U of T physics laboratory was founded at University College in 1878. The two most responsible for equipping the lab, a Canadian professor and a Parisian instrument maker, formed a lasting friendship.


A schematic diagram of the Toronto helium liquifier that was published in the 1923 paper by J. C. McLennan entitled "The Cryogenic Laboratory of the University of Toronto."

Liquifying Helium and the Discovery of Superfluidity

After the First World War, the University of Toronto’s Department of Physics became the second site on Earth to successfully liquify helium. Researchers who worked with liquid helium made discoveries fundamental to the establishment of condensed matter physics.


A cropped section of a black-and- white photograph, likely from 1938, showing Albert F. Prebus (1913-1997) and James Hillier (1915-2007) in front of the recently-built electron microscope.

The 1938 University of Toronto Electron Microscope

In 1938, University of Toronto physicists Albert F. Prebus (1913-1997) and James Hillier (1915-2007), led a small team that built North America’s first practical electron microscope.


A cropped, black-and-white archival photograph of the main section of the linear accelerator shortly after it was installed. It features a prominent sign that reads "CAUTION RADIOACTIVE MATERIALS". The source for this image is given in the "Bibliography" section that is linked in the theme page.

The Short-Lived Linac

During this building’s first decade, it housed a powerful particle accelerator on its subbasement level. This instrument did not live up to expectations, but it laid the foundations for a successful particle physics program.


A cropped section of a colour photograph of the artifact called "Prototype Strip Silicon Detector for LHC ATLAS Inner Tracker". It primarily shows a silver coloured surface (a short strip sensor) and two rows of six application-specific integrated circuit (ASIC) chips.

Collaborative Research With the High Energy Physics Group

Ultimately, the U of T Linac proved to be a footnote in the local history of particle physics. Much subsequent research has taken place as part of collaborative international projects.


A cropped section of a colour photograph of the artifact called "Model of a Tandem Accelerator (High Voltage Engineering)". This is a scale model, including miniature human figures, of an early tandem accelerator made by High Voltage Engineering. It probably dates from the early 1960s.

ISOTRACE: A Revolution in Radiocarbon Dating

For over thirty years, from 1979 to 2013, the McLennan building hosted ISOTRACE, a world centre for Accelerated Mass Spectrometry (AMS) research.


A cropped section of a colour photograph showing part of the automated K-Ar dating apparatus in Derek York's laboratory. The photograph was probably taken in the late 1990s or early 2000s. It notably shows a CRT screen with a video feed of the sample chamber.

Derek York’s Lab Changed the Field of Potassium-Argon Dating

Founded in the 1960s, the laboratory of Derek York (1936-2007) was a major centre for innovation in the study of Potassium-Argon (K-Ar) dating.


A cropped section of a colour photograph showing the UTEM magnetometer receiver's pressure vessel mounted in a cement anchor and suspended over the ocean, presumably prior to deployment. The photograph was taken around 1984.

A Long Legacy in Geophysics

Throughout its history, the University of Toronto has been a world leader in applied geophysics. It has trained hundreds of scientists, many of whom have worked in industry, and has contributed to the development of many other geophysics programs.


A cropped section of a black-and-white photo of Professor Elizabeth J. Allen (1905-1993). The photograph was published in Allen's 1981 history of the Department of Physics. It was likely taken around that time.

Women at the Department of Physics

A challenge in representing the history of science at the University of Toronto is that few artifacts have been collected from women scientists. Still, women researchers have been present at the Department of Physics for longer, and in greater numbers, than one might guess.


A cropped colour image of vortexes in a smectic liquid crystal film created by the Prof. Stephen Morris' "Smectic Electroconvection Experiment". This image is from a video of the experiment. The source is given in the "Bibliography" section that is linked in the theme page.

Beauty and Order in Nature: Nonlinear Physics and Nonequilibrium Pattern Formation

Pattern formation is the study of self organized ordered states in extended classical systems. It is a branch of physics with a close affinity to art and aesthetics.