Title: Letter from Jacob Welsh to the Harvard Corporation,
Authors: Welsh, Jacob, 1755-1822.; Harvard University.
Year: 1806
Subjects: Welsh, Jacob,; Harvard University Alumni and alumnae.; Mathematicians Correspondence.; Mathematics Study and teaching Sources.
Abstract: One-and-a-half page handwritten letter on two leaves sent by Jacob Welsh from Boston to the Harvard Corporation regarding a mathematical question in December 1806. In the letter, Welsh asks for clarification on the differences between the words "demonstration, postulate, and axiom, as used and understood by Mathematicians." On the verso of the last leaf an added inscription identifies the document as "Dr. Jacob Welch's Postulate."