J. C. McLennan

1867 – 1935

• Industrial research in Canada
• On the absorption spectra of thallium, aluminium, lead and tin, and arsenic
• On the extreme ultra-violet spectra of magnesium and selenium
• On the mobilities of ions in helium at high pressure
• On the radioactivity of lead and other metals
• Roentagen radiation
• Science and industry in Canada
• The Metric system