Ontario's Historical Plaques 

Discover Ontario's history as told through its plaques

2004 - Now in our 15th Year - 2019

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Sir John Cunningham McLennan, 1867-1935

Sir John Cunningham McLennan, 1867-1935

Photo by Alan L Brown - Posted October, 2004

Sir John Cunningham McLennan, 1867-1935

Photo by Alan L Brown - Posted April, 2009

Plaque Location

The County of Perth
The City of Stratford
On the Avon River footpath at the back of this house
on the north shore of the river
just east of the Waterloo Street bridge

Coordinates: N 43 22.509 W 80 58.697


Plaque Text

An outstanding Canadian scientist, McLennan was born in Ingersoll and moved to this house in 1883. He attended the University of Toronto where he later became Head of the Physics Department. His research and publications brought international recognition to the University's physics laboratory, which bears his name. A leading advocate of close ties between science, industry and government, McLennan was instrumental in founding the Advisory Council on Industrial and Scientific Research, later the National Research Council. His work in England on the magnetic detection of submarines and the use of radium in the treatment of cancer, his explanation of the yellow-green light in the spectrum of the aurora borealis and his success in liquefying helium, contributed to his world-wide reputation. He was knighted in 1935.



Stratford Plaques

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