I found this in my yard thick with rust. Put it through electrolysis and this is what I've got. It's about 12" and broken on each end. I've done some research and H. N. Hemingway was a metal work factory and foundry in the mid to late 1800s in Rochester NY.
If this is the same guy, he also established a foundry in Rochester NY 16 years later. He also holds patents for button fastening machines an hinges or hinge making machines.