* Christiaan Rudolf de Wet, general

In 1673, Christiaan Huygens published his theory of the pendulum, Horologium Oscillatorium sive de motu pendulorum.

In his 1678 Traité de la Lumiere, Christiaan Huygens showed how Snell's law of sines could be explained by, or derived from, the wave nature of light, using what we have come to call the Huygens – Fresnel principle.

The old Raadsaal in Bloemfontein, with the statue of Christiaan de Wet

At the conclusion of the show, the Boer General Christiaan de Wet would escape on horseback by leaping from a height of into a pool of water.

Although mathematics was not part of his course work, de Moivre read several mathematical works on his own including Elements de mathematiques by Father Prestet and a short treatise on games of chance, De Ratiociniis in Ludo Aleae, by Christiaan Huygens.

Van Schooten's father was a professor of mathematics at Leiden, having Christiaan Huygens, Johann van Waveren Hudde, and René de Sluze as students.

On the Boer side, the government was led by state president Martinus Theunis Steyn ( 1857 – 1916 ) until 30 May 1902, when he went on sick-leave and was replaced by general Christiaan de Wet as acting state president.

Horologium was created in the 18th century by Abbé Nicolas Louis de Lacaille, who originally named it Horologium Oscillitorium after the pendulum clock to honour its inventor, Christiaan Huygens.

de: Christiaan Eijkman

With 9th Brigade and the Imperial Yeomanry, Methuen ’ s Column took part in the operations of June 1900 to trap the elusive Boer leader Christiaan de Wet.

* Christiaan Huygens publishes his Traité de la Lumière / Treatise on Light, which states his principle of wavefront sources.

* Christiaan Huygens publishes his mathematical analysis of the pendulum, Horologium Oscillatorium sive de motu pendulorum.

In Mechelen she won her first follower, Christiaan de Cort.

The notions of the involute and evolute of a curve were introduced by Christiaan Huygens in his work titled Horologium oscillatorium sive de motu pendulorum ad horologia aptato demonstrationes geometricae ( 1673 ).

* Reinier de Graaf, Christiaan Huygens, Antoni van Leeuwenhoek, Willem Ten Rhijne, Benedictus Spinoza, Peter Serrarius

The farm house was converted into a hospital and the mountain pass, bearing the same name of the farm, was guarded in an effort to block the path for the famous Boer general, Christiaan de Wet.

The town was set up, without approval of the Volksraad, by field-cornet Jacobus de Wet, father of the Boer War general Christiaan de Wet.

This was due to there being Bee infestations in the nearby rocky hills, during the building of the railway line in 1904 by General Christiaan de Wet and Dirk Cornelis Lourens, who lived there.

Troops led by General Christiaan de Wet attacked a convoy of 600 of the Royal Irish Rifles on April 4, 1900, and obtained their surrender the next day.

In the fifty years after establishment the Dutch Reformed Church was prominent there and one of the dominees who served there was the famous Rev Andrew Murray. The famous Second Boer War General Christiaan de Wet was born on the nearby farm Leeukop in 1854.

* 1967 – At Groote Schuur Hospital in Cape Town, South Africa, a transplant team headed by Christiaan Barnard carries out the first heart transplant on a human ( 53-year-old Louis Washkansky ).

Christiaan Huygens published the first book on probability

Christiaan Huygens published a book on the subject in 1657 and in the 19th century a big work was done by Laplace in what can be considered today as the classic interpretation.

In 1665 Christiaan Huygens suggested using the melting and boiling points of water as standards, and in 1694 Carlo Renaldini proposed using them as fixed points on a universal scale.

* Christiaan Huygens writes the first book to be published on probability theory, De ratiociniis in ludo aleae (" On Reasoning in Games of Chance ").

Christiaan Huygens was born in April 1629 at The Hague, the second son of Constantijn Huygens, ( 1596 – 1687 ), friend of mathematician, philosopher and minor physicist René Descartes, and of Suzanna van Baerle ( deceased 1637 ), whom Constantijn had married on 6 April 1627.

The first engagement of this new form of warfare was at Sanna's Post on 31 March where 1, 500 Boers under the command of Christiaan De Wet attacked Bloemfontein's waterworks about east of the city, and ambushed a heavily escorted convoy, which caused 155 British casualties and the capture of seven guns, 117 wagons, and 428 British troops.

A bitter dispute between Hooke and Christiaan Huygens on the priority of this invention was to continue for centuries after the death of both ; but a note dated 23 June 1670 in the Hooke Folio ( see External links below ), describing a demonstration of a balance-controlled watch before the Royal Society, has been held to favour Hooke's claim.

For their ideas on derivatives, both Newton and Leibniz built on significant earlier work by mathematicians such as Isaac Barrow ( 1630 – 1677 ), René Descartes ( 1596 – 1650 ), Christiaan Huygens ( 1629 – 1695 ), Blaise Pascal ( 1623 – 1662 ) and John Wallis ( 1616 – 1703 ).

In 1673 Dutch scientist Christiaan Huygens in his mathematical analysis of pendulums, Horologium Oscillatorium, showed that a real pendulum had the same period as a simple pendulum with a length equal to the distance between the pivot point and a point called the center of oscillation, which is located under the pendulum's center of gravity and depends on the mass distribution along the length of the pendulum.

At the time, such speculation was of a rather rarefied sort, and was limited to astronomers like Christiaan Huygens who wrote a book, Cosmotheoros ( 1698 ) considering the possibility of life on other planets ; or to philosophers like Campanella, who wrote in defense of Galileo.

The first success was achieved on December 3, 1967, by Christiaan Barnard in Cape Town, South Africa.

# Christiaan Huygens – Treatise on Light

Christiaan Eijkman was born on 11 August 1858, at Nijkerk, Netherlands as the seventh child of Christiaan Eijkman, the headmaster of a local school, and Johanna Alida Pool.

Nicolas Fatio presented the first formulation of his thoughts on gravitation in a letter to Christiaan Huygens in the spring of 1690.

< div class =" center "> P8: Signatures of Edmond Halley | Halley, Christiaan Huygens | Huygens and Isaac Newton | Newton on Fatio's manuscript </ div >

Running on the platform of self-determination and apartheid as it was termed for the first time, Prime Minister Daniel Malan and his party benefited from their support in the rural electorates, defeating General Jan Christiaan Smuts and his United Party.

A documentary film Hidden Heart which was released widely in 2009 included interviews with Christiaan Barnard and Naki suggesting that Naki was present at the 1967 heart transplantation.

It was notable for containing the principles of the stereographic and the orthographic projections, and it inspired the works of Desargues and Christiaan Huygens.

From its invention in 1656 by Christiaan Huygens until the 1930s, the pendulum clock was the world's most precise timekeeper, accounting for its widespread use.

Optics, for instance, was revolutionized by people like Robert Hooke, Christiaan Huygens, René Descartes and, once again, Isaac Newton, who developed mathematical theories of light as either waves ( Huygens ) or particles ( Newton ).

But Bullialdus did not accept Kepler ’ s second and third laws, nor did he appreciate Christiaan Huygens ’ s solution for circular motion ( motion in a straight line pulled aside by the central force ).

The 17th-century Dutch mathematician Christiaan Huygens discovered and proved these properties of the cycloid while searching for more accurate pendulum clock designs to be used in navigation.

In 1673 Christiaan Huygens derived the equation for the center of oscillation and oscillation period of compound pendulums, thus making use of the general equation for the moment of inertia for the first time.

Other important mathematical physicists of the seventeenth century included the Dutchman Christiaan Huygens ( famous for having suggested the wave theory of light ), and the German Johannes Kepler ( Tycho Brahe's assistant who discovered the equations for planetary motion ).

The following year, Sir Frederick Hopkins postulated that some foods contained " accessory factors "— in addition to proteins, carbohydrates, fats, and salt — that were necessary for the functions of the human body .< ref > Christiaan Eijkman, Beriberi and Vitamin B < sub > 1 </ sub >, Official Web Site of the Nobel Foundation </ ref > In 1901, Gerrit Grijns ( May 28, 1865 – November 11, 1944 ), a Dutch physician and assistant to Christiaan Eijkman in the Netherlands correctly interpreted the disease as a deficiency syndrome, and between 1910 and 1913, Dr. Edward Bright Vedder established that an extract of rice bran is a treatment for beriberi.

* Christiaan Lindemans (" King Kong ") Dutch agent who turned for the Germans

The first tables for the equation of time which accounted for its annual variations in an essentially correct way were published in 1665 by Christiaan Huygens.

* Christiaan Huygens derives the formula for centripedal force.

* Christiaan Huygens patents his 1656 design for a pendulum clock and the first example is made for him by Salomon Coster at The Hague.

This worked to some extent, during his studies he was a coxswain with their rowing club " Triton " and organized a national congress for science students with their science discussion club " Christiaan Huygens ".