Domestic medicine or, the family physician: Being an attempt to render the medical art more generally useful, by shewing people what Is in their own power both with respect to the prevention and cure of diseases: Chiefly calculated to recommend a proper attention to regimen and simple medicines.

This pioneering medical self-help book was an instant success, selling 80,000 copies in Buchan's lifetime— a huge number for that time, and was translated into all the major European languages. Digital facsimile from Harvard Library at this link.

Jean-Denis Duplanil (1740-1802) translated Buchan's work into French as Médecine domestique (Paris, 1775). This single volume French edition Duplanil gradually expanded with new material. Duplanil's fifth edition in French reached 5 vols. (Paris, 1802). Digital facsimile of the 5th edition from Google Books at this link.