My friend also had two Knowlton's Pharmacy Olneyville, RI medicines. One was a large size in aqua and the other similar in size to mine but with a much different embossing size.
A smaller size W.E. Cates Pharmacist Providence, RI also joined the family. This one has a different address than the listed examples.
I haven't found a W.A. Helmer Pharmacist Providence, RI in a while! This 4-1/4" size was unlisted.
One of the most unusual bottles he had was a Rustoff the Rustoff Co. Providence, RI. It was apparently advertised as a rust remover but must have been rather ineffective because I have only seen two of them!
A fancy John E. Potter Pharmacist Providence, RI was another favorite.
