Dark blue glass poison bottle with a brown stained label for Powers & Weightman Mercury Salicylate. This bottle would have been sold by an apothecary or druggist. Due to the poisonous nature of the material, only patients who had a prescription from their doctor would've been able to purchase it. Mercury and mercury-containing preparations have long been used in medicine to treat such conditions as bacteria, fungus, syphilis, and yeast infections. The bright blue color was used to distinguish poison bottles from any food or medicine bottle.