For his son see J.B.S. Haldane

John Scott Haldane (May 3 1860 - March 15/March 14 1936) was a Scottish medical doctor and father of J.B.S. Haldane, and brother of Elizabeth Haldane and Richard Burdon Haldane, 1st Viscount Haldane. He was Gifford Lecturer in the University of Glasgow, Fellow of New College, Oxford, and Honorary Professor of the University of Birmingham. He was educated at the Universities of Edinburgh and Jena, and held the degrees of Master of Arts from Edinburgh and Oxford, Doctor of Law from Edinburgh and Birmingham, and Doctor of Medicine from Edinburgh. He was also President of the English Institution of Mining Engineers, a Companion of Honor of the British Court, a Fellow of the Royal Society, a member of the Royal College of Physicians and of the Royal Society of Medicine.

He was an international authority on ether and respiration and the inventor of the gas-mask during World War I. ("The Sciences and Philosophy: Gifford Lectures, University of Glasgow, 1927-28" by J.S. Haldane, Doubleday, Doran and Co., Inc., Garden City, NY, 1929)

Accomplishments

John Scott Haldane help found out how to determine the regulation of breathing. He is the founder of The Journal of Hygiene. Haldane made a decompression apparatus to help make deep-sea divers safer. Haldane also was an authority on the effects of pulmonary diseases. He investigated the principal of action of gasses.