To the Right Honourable the
Earl of HALIFAX.
My Lord,
Most humbly beg Leave tooffer to your Lordship threeLetters on. Mining andSmelting ; and a fourth, ofa new discovered Method of securingShips Bottoms against the TVorms :They were wrote,at first with an In-tention only , to serve a few Indivi-duals ; but, as I thought they mighttend to promote the publick Good,and, in Consequence, concerned theNation in general, Well knowinghow much your Lordjhip makes thenational Interest your own, I havepresumed, with the Author’s Con-sent, to present them to you for yourPerusal; not doubting, should they
appear