Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,188 pages of information and 227,783 images on early companies, their products and the people who designed and built them.
Professor Henry Moseley (9 July 1801 – 20 January 1872) was an English churchman, mathematician, and scientist.
See Wikipedia entry.
Prof. Moseley's constant indicator for steam engines described and illustrated, followed by details of its construction and discussion on its use in investigating the performance of Cornish pumping engines. William Pole was an assistant to Moseley in these investigations.