ARMSTRONG, JOHN, M.D., an eminent physician and medical writer, was born in 1784, at Bishop Wearmouth in Durham. Having received some preliminary education, he completed his studies at the University of Edinburgh, where he obtained his medical degree in 1807. He then became a candidate for practice in his native place, but soon afterwards removed to Sunderland, where he engaged in extensive practice, and became physician to the dispensary in that town. This situation he resigned in 1817, and settled in London, where the reputation he had already acquired by his writings prepared the way for his future success. As a lecturer, also, in the Webb Street School at London, Dr Armstrong was highly popular. His lectures, edited by Joseph Rix, were published in 1834 in one volume 8vo. His principal work is that entitled Practical Illustrations of Typhus Fever and other Febrile and Inflammatory Diseases, which was published in 1816. Dr Armstrong died of pulmonary consumption in 1829. He is represented as a man of estimable character,—yet it is to be regretted that he had the temerity to depreciate such men as Mead, Cullen, and Heberden; though their reputation indeed, stands too high to be affected by such criticism.