The palladium extraordinary : (price Is. 6d.) for the year of our Lord, 1763. Completing the set of all former palladiums. Containing a large improvement on the former plan, in a greater quantity and variety of new, useful, and interesting science than heretofore. With general and particular chronological tables, time and tide rules, the state and motion of the heavens, an account of the year, &c. The fifteenth number published. By the author of the Royal astronomer and navigator.