From Beehive, the blog of the Massachusetts Historical Society:
Andrew Croswell (1778-1858) was a student at Harvard University in the late 1790s. He later studied medicine in Plymouth, MA, and practiced there and in Fayette and Mercer, ME. In the collections here we hold two notebooks that were kept by Croswell. The first is a mathematical notebook which contains definitions and problems in geometry, trigonometry, and surveying. The second is a physician's notebook that contains notes on the treatment of diseases and injuries, as well as the use of some medicines.
More pages at the blog post, two shown below.
Image Copyright MHS