Medicina gerocomica [electronic resource] : or, the galenic art of preserving old men's healths explain'd: In Twenty Chapters. With an Appendix, concerning the Use of Oils and Unction, in some Diseases. And a Method, from a Florentine Physician, of curing Convulsions and Epilepsies, by external Operation. By Sir John Floyer, M. D. The second edition, corrected. To which is added, A letter to the Honble Mr. Ch----- St-----: Concerning the Regimen of the Health of the Younger Years and Adults, as Galen has describ'd them.