Scale drawing of Lincolns invention showing side view and cross section.The original drawing is now missing from the National Archives file. LINCOLN LORE 3 … Scale model of Lincolns invention embodying all of the specifications for construction, except for the application ofsteam power to shaft C to inflate the air chambers. From the Carl W. Schaefer Collection. by letter patent. During my former residence in St.Louis, I had made myself thoroughly…
