The description and use of four new instruments : viz. First. The variation and tide instrument. Second. A lunar instrument for shewing the places of sun and moon; ... Third. The improved analemma, ... Fourth. The panorganon for solving those of the terrestrial globe; ... By Benjamin Donn. - Donne, Benjamin, (Sold by Messrs. Mount and Page; B. Law; J. Johnson; R. Sayer; Messrs. Heath and Wing; and by the author at Bristol. Of whom may be had, the instruments,, 1772)