What was advertised in a colonial American newspaper 250 years ago today?
“Genuine Medicines to be sold in New-York, by GERARDUS DUYCKINCK Merchant, only.”
Several apothecaries operated shops in New York and advertised in the local newspapers in the spring of 1767, but they were not the only residents who sold medicines in the city. Gerardus Duyckinck, a merchant who ran the “UNIVERSAL STORE, Or the MEDLEY of GOODS … At the Sign of the Looking-Glass, and Druggist Pot,” also peddled remedies. As he was not an apothecary himself, he dressed up his advertisements with several sorts of puffery in order to compete with others who specialized in compounding drugs and selling patent medicines.
For instance, Duyckinck opened his advertisement with what appeared to be some sort of official proclamation that bestowed some degree of exclusivity on the merchant: “To the PUBLICK. By Virtue of the King’s Royal Patent for Great-Britain, Ireland, and the Plantations, for many Patent Medicines, to the Proprietors of each, to enjoy the full Benefit, are now sold under the Royal Sanction, by Messieurs William and Cluer Dicey, and Comp. of London, who now appoint their genuine Medicines to be sold in New-York, By GERARDUS DUYCKINCK Merchant, only.” Although the advertisement listed many tinctures and nostrums advertised and sold by several druggists and apothecaries in New York, the grandiloquent language implied that Duyckinck alone possessed the right to peddle those cures. Anyone else did so without official sanction.
This also allowed Duyckinck to warn readers against counterfeits and assure potential customers that he sold only authentic medicines. He did so in two ways. In a nota bene, he announced that all the drugs on his list had been “bought by William and Cluer Dicey, and Comp. from the original Ware-Houses, and warranted genuine.” In addition, he provided “Proper Directions to each … to avoid the Consequence of Counterfeits.” Duyckinck did not outright accuse his competitors of selling counterfeits, but the several aspects of his advertisement worked together to create doubts about the efficacy and authenticity of any medicines purchased from other vendors. Patent medicines were advertised far and wide in colonial newspapers. By inserting these enhancements to what otherwise would have been a standard list-style advertisement, Duyckinck devised a marketing strategy that distinguished him from his competitors.
 For this description of his store, see the other advertisement Duyckinck placed on June 4, 1767, a list-style notice of an assortment of imported goods in the New-York Journal. It briefly mentioned “Drugs and Medicines” near the end.