1 (.-, .:■...: ( 1= 9 a -rr ■ J, J? 1^ —r —, rr^ ,1 rmrj ^ „ … K A sketch of Abraham Lincolns plan for buoying vessels over shoals, filed with hisapplication for a patent, March 10, 1849. The ingenious device consisted of ropes,pulleys and bellows. The bellows, located on either side of the vessel just belowthe water line, were to be filled with air thus…
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-651-414.webp)
