Cautions to the heads of families, in three essays : 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.