4
by Norris, Thomas
Published 1778
printed for the author, and given gratis by Messrs. Fielding and Walker, Booksellers, in Pater-Noster-Row, the Wholesale Venders of these Drops, which are also sold by Dr. Norris, at his House in Duke-Street, Westminster

5
by Norris, Thomas
Published 1783
printed for the author, and to be had at his house in Bridge-Street, Black-Friars, or at his laboratory in Bride-Lane, (where the Drops are sold in Bottles at 2s. 6d. 5s. and 10s. 6d. each) and by all other vendors of these drops, most of whose names are inserted at the end of this essay