An address to the King and Parliament of Great Britain, on the important subject of preserving the lives of its inhabitants, by means which, with the sanction and assistance of the legislature, would be rendered simple, clear, and efficacious to the people at large ... With an appendix, in which is inserted a letter from Dr. Lettsom, to the author. To which are subjoined, hints for improving the art of restoring suspended animation: and also for administering dephlogisticated air in certain dise