This was one of the products of Mulhens & Kropff of New York City. They registered a trademark for this Hair Tonic in 1898 (TM #31,682). The trademark they registered was the representation of a medusa's head. They said they had just started using the symbol the same year. The trademark Application was signed by William Kropff. They said the trademark would be placed on the labels of bottles.
This was the same type of a trademark they used on Captol Hair Tonic, but I don't think they were the same product.