Directions for the use of Velnos' vegetable syrup. Cases, shewing the salutary, various and wonderful effects of that celebrated medicine: and a summary view of the artifices, by which impostors have attempted to substitute ineffectual or poisonous preparations for the genuine syrup of Mr. De Velnos. By Isaac Swainson, sole proprietor and only successor to Mr. De Velnos and Dr. Mercier, at No. 21, Frith Street, Soho, London, where the medicine is prepared, and sold at 11s. 6d. a bottle; and by his appointment at Mr. Atkinson's, chymist and druggist, No. 196, Bishopsgate Street; and at Mr. Ridgway's, No. 196, Piccadilly; and no where else in London.