John Armstrong, a British physician, poet, and miscellaneous writer, born in Castleton parish, Roxburghshire, about 1709, died in 1779. His father was a clergyman. He studied at the university of Edinburgh, and after receiving his medical diploma settled in London, where he published anonymously "An Essay for Abridging the Study of Physic" (1735), ridiculing the ignorance of the apothecaries. In 1737 he published an outrageously indecent poem entitled "The Economy of Love." In 1744 appeared " The Art of Preserving Health," a didactic poem whose merits were greatly overrated. In 1760, through the influence, as it is said, of John Wilkes, he was made physician to the army in Germany, and held that office until the peace of 1763. His remaining published writings include a volume of "Sketches or Essays," a collection of short poems under the title of "Miscellanies," a "Short Ramble through France and Italy," and a volume of medical essays.