**John Bonnycastle** (baptized 29 December 1751 in Hardwick or Whitchurch, England – 15 May 1821 in Woolwich, England) was an English teacher of mathematics and author.

John Bonnycastle was born in Buckinghamshire, in about 1750. Nothing is known of his family or early life, but he went to London where he established an Academy. He became a tutor to the two sons of the Earl of Pontefract at Easton in Northumberland. Between 1782 and 1785, he was appointed Professor of Mathematics at the Royal Military Academy, Woolwich, where he remained until his death on 15 May 1821.^{ [1] }

He was a prolific writer, and wrote for the early volumes of * Rees's Cyclopædia *, about algebra, analysis and astronomy.

At the age of 19, he married a Miss Rolt, but she died young. On Oct.7th, 1786 he married Brigette Newell with whom he had six children Charlotte, William, Mary, Sir Richard (Royal Engineer/Author), Humphrey and Charles.

His son Richard Henry Bonnycastle settled in Canada, where the family became quite well known in Winnipeg and Calgary.

His son, Charles Bonnycastle (1796-1840) became Professor of Mathematics at the University of Virginia.

*The Scholar's guide to Arithmetic*, 1780*Introduction to Algebra*, 1782*Introduction to Astronomy*, 1786 (7th edition 1816)*Euclid's 'Elements'*with notes, 1789*A Treatise on Plane and Spherical Geometry, 1806**A Treatise of Algebra*, 1813^{ [1] }

Professor **Dionysius Lardner** FRS FRSE was an Irish scientific writer who popularised science and technology, and edited the 133-volume *Cabinet Cyclopædia*.

**Arthur Cayley** was a prolific British mathematician who worked mostly on algebra. He helped found the modern British school of pure mathematics.

The **Royal Military Academy** (**RMA**) at Woolwich, in south-east London, was a British Army military academy for the training of commissioned officers of the Royal Artillery and Royal Engineers. It later also trained officers of the Royal Corps of Signals and other technical corps. RMA Woolwich was commonly known as "The Shop" because its first building was a converted workshop of the Woolwich Arsenal.

**Sir William Vallance Douglas Hodge** was a British mathematician, specifically a geometer.

**Robert Woodhouse** was an English mathematician.

**Charles Hutton** FRS FRSE LLD was an English mathematician and surveyor. He was professor of mathematics at the Royal Military Academy, Woolwich from 1773 to 1807. He is remembered for his calculation of the density of the earth from Nevil Maskelyne's measurements collected during the Schiehallion experiment.

**Edmund Taylor Whittaker** FRS FRSE LLD was a British mathematician who contributed widely to applied mathematics, mathematical physics, and the theory of special functions. He had a particular interest in numerical analysis, but also worked on celestial mechanics, the history of physics, and digital signal processing. Near the end of his career he received the Copley Medal, the most prestigious honorary award in British science. The School of Mathematics of the University of Edinburgh holds The Whittaker Colloquium, a yearly lecture in his honour.

**Lieutenant-Colonel Sir Richard Henry Bonnycastle** was an officer of the British army active in Upper Canada.

Prof **Alexander Wilson** was a Scottish surgeon, type-founder, astronomer, mathematician and meteorologist. He was the first scientist to use of kites in meteorological investigations.

Prof **Andrew Russell Forsyth**, FRS, FRSE was a British mathematician.

**William Rutherford** (1798–1871) was an English mathematician famous for his calculation of 208 digits of the mathematical constant π in 1841.

**Bapudeva Sastri** or **Narasimha Deva Paranjpe** (1821–1900) was an Indian scholar in Sanskrit and mathematics.

**James Inman** (1776-1859), an English mathematician and astronomer, was professor of mathematics at the Royal Naval College, Portsmouth, and author of *Inman's Nautical Tables*.

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**John Radford Young** was an English mathematician, professor and author, who was almost entirely self-educated. He was born of humble parents in London. At an early age he became acquainted with Olinthus Gilbert Gregory, who perceived his mathematical ability and assisted him in his studies. In 1823, while working in a private establishment for the deaf, he published *An Elementary Treatise on Algebra* with a dedication to Gregory. This treatise was followed by a series of elementary works, in which, following in the steps of Robert Woodhouse, Young familiarized English students with continental methods of mathematical analysis.

**Bartholomew Lloyd** (1772–1837) was an Irish mathematician and academic whose entire career was spent at Trinity College Dublin. As Erasmus Smith's Professor of Mathematics there, he promoted significant curricular reforms, including the introduction of the teaching of calculus, Later he served as Provost of the college.

**Enoch Lewis** was a mathematician. He early exhibited a talent for mathematics, at the age of fourteen was usher in a country school, and at fifteen became principal. In the autumn of 1792 he removed to Philadelphia, studied mathematics, teaching half of each day to earn his support, and in 1795 was engaged as a surveyor in laying out towns in western Pennsylvania under the direction of Andrew Ellicott.

**Johann Friedrich Schultz**, also known as **Johann Schultz**, was a German Enlightenment, Protestant, theologian, mathematician and philosopher. He is best known as a close personal friend and trusted expositor of Immanuel Kant. Johann Schultz was a *Hofprediger* and Professor of Mathematics at the University of Königsberg.

- Whittaker, Thomas (1886). Stephen, Leslie (ed.).
*Dictionary of National Biography*.**5**. London: Smith, Elder & Co. . In *Gentleman's Magazine*, 1821, i, 472, 482- O'Connor, John J.; Robertson, Edmund F., "John Bonnycastle",
*MacTutor History of Mathematics archive*, University of St Andrews .

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