NATHANIEL BOWDITCH (1773-1838).  Astronomer; Mathematician; Insurance Executive.  Bowditch was constantly reading and studying from early childhood, constructing his own almanac when he was 15.  In 1802, he wrote The American Practical Navigator, a treatise which explained the principles of navigation and practical methods of their application.  The rights to this were purchased by the United States Navy, and it was commonly referred to as “the seaman’s bible.”  His works in astronomy and in the development of mathematical tables are widely known.  He was a long-time member and President of the American Academy of Arts and Sciences. DS. 1pp. 5” x 2”. Boston. Dec 11, 1834.  A check signed by Nathaniel Bowditch while an actuary of the Massachusetts Hospital Life Insurance Company.  He paid P. Adams twenty-five dollars.  There are two cancellation holes away from the signature and it is in fine condition overall.