lows running beneaththe lower guards near the water. Lincoln estimated thatone inch of the lifting power of his models buoyantchambers would represent one foot on a regular sizesteamboat. Gaines Paddock of Springfield recalled how AbrahamLincoln came into John Williams store on the north sideof the… … Patent Office model made by Abraham Lincoln and Walter Davis illustrating the method of lifting vessels over shoals,patented May 22, 1849, Number 6,469. Now exhibited at the Smithsonian Institution. See Lincoln Lore Number 843,June 4, 1945. LINCOLN LORE
