Mary Lincoln Extra Credit Questions

[RJNorton]

I do not know, Eva, but I doubt it. In Wikipedia it says, "However, it was never produced for practical use. There are doubts as to whether it would have actually worked: It "likely would not have been practical," stated Paul Johnston, curator of maritime history at the National Museum of American History, "because you need a lot of force to get the buoyant chambers even two feet down into the water. My gut feeling is that it might have been made to work, but Lincoln's considerable talents lay elsewhere."

https://en.wikipedia.org/wiki/Abraham_Li...27s_patent