FIRST EDITION, 8vo, pp. [xii], 403, . Contemporary sprinkled calf, boards bordered in gilt and blind. Frequent woodcut diagrams within the text. A little light spotting, dampmark to a few leaves at beginning. Rebacked, black label to spine, old leather chipped and a touch worn at edges. Ownership inscription of T. Worsley dated 1768 to flyleaf, with note ‘Marsh in his Treatise upon Demicals contents this book in his Preface’.