Mr. Weismann was for many years associated with his uncle, August W. Weismann, one of the earliest druggists and chemists in New York City, his store being on the corner of Broome and Orchard Streets. In 1874 he engaged in the drug trade on his own account in West Hoboken, where he died in March, 1896, highly respected and esteemed. He was a man of considerable prominence in the community, of great force of character, and of unquestioned honesty and integrity, and always took a deep interest in public affairs. His attention, however, was given wholly to business, in which he was successful.