To be had of Messrs. TREWMAN and SON, Exeter. TO SWEETEN the BREATH, cleanse the MOUTH, preserve and whiten the TEETH, and cure GUM BOILS, the Preparation of NEWTON'S RES TORATIVE TOOTH-POWDER, from the recipe of the late SIR RICHARD JEBB, M.D. has been most success- ful ; It is particularly recommended to be used in all cases where the Teeth and Gums are in a bad state, where the enamel is impaired, the Teeth very loose or partly decayed, or the Gums spongy, sore or apt to bled ; symptoms which proceed from Scurvy, and which this Powder will never fail to remedy. It is a certain, safe, and speedy cure for the Tooth ach, and and extremely efficacious in arresting the pro- gress of disease, where fragments of unsound Teeth remain in the head, causing violent pain, and imparting their noxious contagion to the adjoining teeth. Newton's Tooth Powder is sold by all Dealers in Me- dicines and Perfumery throughout the Kingdom ; in Exeter; by Messrs. Trewman and Son, Hedgeland, Evans, Lee, Williams and Dyer, Hill, Curson, Ware, Pearse, Mus- grave, Dymonds, and Newton; Nott, Croydon, Forward, Teignmouth; Rogers and Williams, Honiton; Jarman, Exmouth; Quick, and Frost, Tiverton.Source: Trewman's Exeter Flying Post, Or, Plymouth and Cornish Advertiser, Thursday 19th January 1815. Notes: Line 10 - "bled" instead of "bleed" is as in original. Line 13 - Tooth ach (or, more often, tooth-ach) was a common spelling during this period.
Trewman and Son, you'll notice, owned the newspaper as well as being the agents for this remedy. It was normal for provincial newspaper printers to be the stockists for medicines made in London. The "late Sir Richard Jebb" was a genuine doctor appointed physician to the Prince of Wales in 1780 and, briefly, to George III in 1786. He died in 1787, so it's rather doubtful whether he could have had any approval over the recipe of this 1815 medicine.