A father's instructions [electronic resource] : consisting of moral tales, fables, and reflections; designed to promote the love of virtue, a taste for knowledge, and an early acquaintance with the works of nature: by Thomas Percival, M.D. F.R.S. and A.S. Lond. F.R.S. and R.M.S. Edinb. President of the Literary and Philosophical Society of Manchester, and member of various foreign societies