Was published, April 1st, 1801 ... an entire new work, entitled, Cases of successful practice with Perkins's metallic tractors, communicated since January, 1800 / [Benjamin Douglas Perkins].
License information
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Was published, April 1st, 1801 ... an entire new work, entitled, Cases of successful practice with Perkins's metallic tractors, communicated since January, 1800 / [Benjamin Douglas Perkins]. Credit: Wellcome Collection. Public Domain Mark