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Abraham Lincoln's mechanical mind
Lincoln's lecture on discoveries and inventions : the unknown draft
Appendix 1 : patent no. 6.469, May 22, 1849, Buoying vessels over shoals, Abraham Lincoln, of Springfield, Illinois
Appendix 2 : Lincoln's first and second lectures on discoveries and inventions.
Lincoln's lecture on discoveries and inventions : the unknown draft
Appendix 1 : patent no. 6.469, May 22, 1849, Buoying vessels over shoals, Abraham Lincoln, of Springfield, Illinois
Appendix 2 : Lincoln's first and second lectures on discoveries and inventions.