Guelph in Wellington County, Ontario — Central Canada (North America)
William Henry Day 1870-1938
OAC Physics Department Instructor, 1903-1906
Head, Physics Department, 1906-1919
William Day was born in Fenelon Falls, Ontario in 1870. He taught school for six years, then entered the Unversity of Toronto and graduated as a Gold Medalist in physics and mathematics in 1903.
That year, he joined the Physics Department of OAC, then became Head of the Physics Department in 1906. Day took over from J. B. Reynolds, who had initiated research in soil testing, farm drainage and lightning rods. Building on Reynolds' work, Day reported that of every $1,000 of lightning damage, rods could save $999, a finding of great importance to the farming community.
Day also joined Reynolds' call for extensive soil testing, which would eventually become standard procedure in the province. He was also responsible for extensive farm drainage initiatives in Ontario and encouraged the Ministry of Agriculture to provide loans for land drainage, work supported by the Physics Department.
So convinced was Day of the benefits of drainage that he involved the Physics Department in experimenting and producing 6,000 tiles a year by 1910. In 1912. Physics and three other departments acquired a ditching machine, which enabled experiments on drained and undrained test plots. By 1918, 142,000 acres of land had been tiled and drained under the auspices of Physics.
During the First World War, college and military authorities formed a Canadian Officers Training Corps on campus. Day was the commanding officer of the 256 men who had enrolled by 1915.
After the war, Day formed a syndicate to acquire options on the Holland Marsh, north of Toronto, convinced that if properly drained it could be the best market garden land in Ontario. Eventually the area's municipalities agreed to a drainage scheme and Day was credited with establishing today's rich Holland Marsh. The first crops were harvested in 1927.
In 1919 Day retired from OAC to take a managerial position with a lightning rod company and became a land owner in the Holland Marsh.
Day Hall, buiit In 1895, was originally used for Animal Husbandry and later as the Physics Annex.
Day Hall 1895
On the occasion of the 1l0th anniversary of the Department of Physics (1895-2005)
Erected by University of Guelph.
Topics. This historical marker is listed in these topic lists: Agriculture • Education • Science & Medicine. A significant historical year for this entry is 1870.
Location. 43° 31.901′ N, 80° 13.619′ W. Marker is in Guelph, Ontario, in Wellington County. It can be reached from Weingard Walk. The marker is in the campus of the University Guelph on Winegard Walk, accessible by foot on Reynolds Walk, approx 200 metres west of Trent Lane. Touch for map. Marker is at or near this postal address: 99 Trent Lane, Guelph ON N1G 1Y4, Canada. Touch for directions.
Regionally, this marker is in the Huron-Perth-Waterloo-Wellington Area and in Southwestern Ontario. It is also in Central Canada. Globally, it is in North America, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once a British colony, the Viceroyalty of New France, the Haudenosaunee (Iroquois) Confederacy, and Ruperts Land.
Other nearby markers. At least 8 other markers are within walking distance of this marker: MacKinnon Building (within shouting distance of this marker); George E. Raithby 1901-1981 (within shouting distance of this marker); Winegard Walk (within shouting distance of this marker); Site of the Gymnasium and Convocation Hall of the Ontario Agricultural College (within shouting distance of this marker); Charles A. Zavitz 1863-1942 (about 90 meters away, measured in a direct line); The Fire Hall (about 90 meters away); MacNaughton Building (about 120 meters away); Massey Hall (about 120 meters away). Touch for a list and map of all markers in Guelph.
Credits. This page was last revised on September 6, 2025. It was originally submitted on September 5, 2025, by Tim Boyd of Hamilton, Ontario. This page has been viewed 56 times since then and 13 times this year. Photos: 1, 2, 3. submitted on September 5, 2025, by Tim Boyd of Hamilton, Ontario. • Andrew Ruppenstein was the editor who published this page.


