The profitable intelligencer [electronic resource] : communicating his knowledge for the generall good of the common-wealth and all posterity. Containing many rare secrets and experiments (having reference to a larger book) which being well observed, and industriously practised, according to the directions therein by all the inhabitants of England in generall, will recover the wealth of the kingdom now so miserably wasted by these unnaturall wars, and make it the most flourishing countrey in the world, and cause more naked to be clothed, more hungry to be fed, more poore virgins to be preferred in marriage, more sick to be healed, then Suttons Hospitall the Savoy, and all the hospitals and liberall gifts in England have ever performed, by certain wayes which require no charge nor labour, but what every active person shall be double payed for. A copie of the letter, wherein the discourse entituled, Mercurius Laetificans, was sent enclosed to the authors most worthy, and highly honoured friend, Mr. Samuel Hartlib.