an English physician. While at Sunderland, Armstrong published, besides several memoirs in the Edinburgh Medical Journal, Facts and Observations relative to the Fever commonly called Puerperal (London, 1814), and Practical Illustrations of Typhus and other Febrile Diseases (London, 1816), by which he became known to the medical profession. He published Practical Illustrations of the Scarlet Fever, Measles, Pulmonary Consumption (London, 1818), which added to his reputation. Popular at the time, and based on his own observations, they became obsolete shortly. Armstrong's own views changed in relation to typhus, which he in his earlier works asserted to be contagious, but in his later memoirs (The Lancet, 1825) attributed to a malarial origin. In treatment Armstrong was an ardent advocate of the antiphlogistic system, and made a copious use of bleeding.
