Bok om tjära

HALES, STEPHEN. An account of some experiments and observations on tar water: wherein is shown the Quantity of Tar that is therein. Which was read before the Royal Society. The second edition... To which is added A Letter from Mr. Reid to Dr. Hales, concerning the Nature of Tar, and a Method of obtaining it´s Medical Virtues, free from it´s hurtful Oils:... London (printed for R. Manby and H. S. Cox) 1747.
8:o. (2), 1-74 pp. 1 illustration in woodcut.
No wrappers. Nearly uncut. Title and first leaf with loss of paper in upper margin and title also in outer. Title with some damages in inner margin. Worn in outer margin. Title somewhat soiled, some minor foxing.
This second edition is important as it more than doubles the length of the first edition of 1745, with the addition of Andrew Reid´s Letter which runs from pages 31-74.