printed for the author. Sold by Messrs. Mount and Page, on Tower-Hill; Mr. Johnson and Co. in Pater-Noster-Row; and Mr. B. Law, in Ave-Mary-Lane, Booksellers. Mr. Adams, and Mr. Martin, in Fleet-Street; and Messrs. Heath and Wing, Mathematical-Instrument-Makers, in the Strand. London

printed for J. Johnson, opposite the Monument

published by the author, M.DCC.LXXXVII. Sold also by most of the principal Instrument-Makers in London

printed for and sold by the author in Bristol; W. Johnson and B. Law, in London

Sold by. J. Johnson, in St. Paul's Church-Yard; and B. Law, in Ave-Mary Lane, London:- also at the Academy, in Bristol

Printed for B. Law, Ave-Maria-Lane

Printed for the author, and sold by the booksellers of Devon; by Mr. Johnston, in Ludgate-Street; Mr. Law, in ... Lane; Mr. Johnson, opposite the monument; Mr. Baldwin, in Pater-noster-Row; and the Book sellers of London

printed for B. Law, in Ave-Maria Lane

sold by Messrs. Mount and Page, on Tower-Hill; B. Law, in Ave-Mary-Lane; J. Johnson, St. Paul's Church-Yard; R. Sayer, in Fleet-Street; Messrs. Heath and Wing, in the Strand; and by the author at Bristol. Of whom may be had, the instruments

printed for and sold by the author, at Bristol

printed by Sabine and Son, Shoe Lane, Fleet Street

sold by B. Law; and G. Kearsley. Also by Messrs. Heath and Wing; and by the author at Bristol

Burton, printer, 82, Fetter Lane

printed for and sold by the author. Sold in London by Messrs. Vernor and Hood, Booksellers, Birchin-Lane, Cornhill; and by the following mathematical instrument makers: Mr. Adams and Mr. Troughton, Fleet-Street, and Mr. Jones, Holborn