While doing some research on Abe Lincoln I came across this interesting article from the March 1924 edition of Popular Mechanics.

The article discusses a model of a device for helping to lift vessels over a shoal. The article also has some interesting illustrations. I’m not going to vouch for the validity of the article, but I thought it was interesting and worth sharing.

Popular Mechanics — March 1924

You can also view Lincoln’s only patent: Buoying Vessels over Shoals