Mark Beaufoy

Colonel Mark Beaufoy FRS (1764–1827) was an English astronomer and physicist, mountaineer, explorer and British Army officer. His father, Mark Beaufoy (1718–1782), who was originally from Evesham, established a vinegar factory in Lambeth, London. According to the family tree on Ancestry.com, he was born 1764 March 4, died 1827 May 4.

He was the first-known English climber to make an ascent of a high mountain in the Alps. In 1787, he made an ascent (the fourth) of Mont Blanc. This mountain was an attraction to his fellow countrymen, such as J. D. Forbes (1809–1868), A. T. Malkin (1803–1888), John Ball (1818–1889) and Sir Alfred Wills (1828–1912). He describes his ascent of Mont Blanc:

He devoted much of his life to naval experiments at the Greenland Dock with James Scott and Captain John Luard of the "Society for the Improvement in Naval Architecture". He published the results of his work in one of the leading scientific journals of the day, The Annals of Philosophy. In 1815 he described a recording tide meter, and in the same article went on to describe the power of the wind on square sails and the resistance to motion both in air and water of different shapes. The paper moved from ship sails to considering the best angle for windmill sails to be set. He supplied Astronomical and Magnetic observations from Hackney Wick (51°32‘40“N, 6.82“W) for many issues.Charles Hutton's 1815 list of England's most notable private observatories included Colonel Beaufoy's.

In 1816 Beaufoy published another extensive article based on his experimental work. On the Stability of Vessels was based on 23 different hull forms tested for their resistance to rolling. The article includes an illustration of his apparatus showing a hull form being subjected to a controlled heeling force with a plumb bob and scale to measure the inclination. The various tables of results show the metacentre. The dichotomy between resistance to rolling and sea keeping is discussed.

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