[506] See Vol. I, page 77, note 4 {118}.
[507] See Vol. I, page 125, note 3 {253}.
[508] See Vol. I, page 105, note 2 {186}.
[509] Heinrich Oldenburgh (1626-1678) was consul in England for the City of Bremen, his birthplace, and afterwards became a private teacher in London. He became secretary of the Royal Society and contributed on physics and astronomy to the Philosophical Transactions.
[510] Thomas Brancker, or Branker (1636-1676) wrote the Doctrinæ sphæricæ adumbratio et usus globorum artificialium (1662) and translated the algebra of Rhonius with the help of Pell. The latter work appeared under the title of An Introduction to Algebra (1668), and is noteworthy as having brought before English mathematicians the symbol ÷ for division. The symbol never had any standing on the Continent for this purpose, but thereafter became so popular in England that it is still used in all the English-speaking world.
[511] See Vol. I, page 118, note 1 {230}.
[512] Pierre Bertius (1565-1629) was a native of Flanders and was educated at London and Leyden. He became a professor at Leyden, and later held the chair of mathematics at the Collège de France. He wrote chiefly on geography.
[513] See Vol. II, page 297, note [487].
[514] Giovanni Alphonso Borelli (1608-1679) was professor of mathematics at Messina (1646-1656) and at Pisa (1656-1657), after which he taught in Rome at the Convent of St. Panteleon. He wrote several works on geometry, astronomy, and physics.
[515] See Vol. I, page 172, note 2 {381}.