Directions for the use of Velnos' vegetable syrup. Cases, shewing the ... 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 ... 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 ...
Swainson, Isaac,1746-1812.
[London],
1786.
ESTC