Medicina hydrostatica: or, Hydrostaticks applyed to the materia medica. Shewing, how by the weight that divers bodies, us'd in physick, have in water; one may discover whether they be genuine or adulterate. To which is subjoyn'd, a previous hydrostatical way of estimating ores/ By the Honourable Robert Boyle ... - Boyle, Robert, 1627-1691 (Samuel Smith, 1690)