Your friend as ever,
A. LINCOLN.
REQUEST FOR A PATENT
IMPROVED METHOD OF LIFTING VESSELS OVER SHOALS.
Application for Patent:
What I claim as my invention, and desire to secure by letters patent, is
the combination of expansible buoyant chambers placed at the sides of a
vessel with the main shaft or shafts by means of the sliding spars, which
pass down through the buoyant chambers and are made fast to their bottoms
and the series of ropes and pulleys or their equivalents in such a manner
that by turning the main shaft or shafts in one direction the buoyant
chambers will be forced downward into the water, and at the same time
expanded and filled with air for buoying up the vessel by the
displacement of water, and by turning the shafts in an opposite direction
the buoyant chambers will be contracted into a small space and secured
against injury.
A. LINCOLN.
TO THE SECRETARY OF INTERIOR.
SPRINGFIELD, ILL., June 3, 1849
HON. SECRETARY OF INTERIOR.
DEAR SIR:--Vandalia, the receiver's office at which place is the subject
of the within, is not in my district; and I have been much perplexed to
express any preference between Dr. Stapp and Mr.
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