Cautions to the heads of families, in three essays [electronic resource] : I. On cyder-wine, prepared in Copper Vessels; with Hints for the Improvement of Cyder, Perry, and other Fruit Liquors. II. On the poison of lead -Method of detecting it in various Liquors, Foods, Medicines, Cosmeticks, &c. with general Indications of Cure. III. On the poison of copper -How it may be discovered though in very minute Quantity-Method of Cure. By A. Fothergill, M.D. F. R. S. Member of the Royal College of Physicians, London, And of the Medical Societies of London, Edinburgh, and Paris.