* 1858 – Christiaan Eijkman, Dutch physician, Nobel Prize laureate ( d. 1930 )

* 1930 – Christiaan Eijkman, Dutch physician and pathologist, recipient of the Nobel Prize in Physiology or Medicine ( b. 1858 )

* Christiaan Eijkman ( physician, pathologist, Nobel Prize laureate )

* Physiology or Medicine – Christiaan Eijkman, Sir Frederick Gowland Hopkins

* November 5 – Christiaan Eijkman, Dutch physician and pathologist, recipient of the Nobel Prize in Physiology or Medicine ( b. 1858 )

* August 11 – Christiaan Eijkman, Dutch physician and pathologist, recipient of the Nobel Prize in Physiology or Medicine ( d. 1930 )

After reading an article by the Dutchman Christiaan Eijkman that indicated people eating brown rice were less vulnerable to beri-beri than those who ate only the fully milled product, he tried to isolate the substance responsible and he succeeded around 1912.

* Christiaan Eijkman, ( 1858 – 1930 ), physician & pathologist Prize 1929

In 1897, Dr. Christiaan Eijkman, a Dutch physician and pathologist, demonstrated that beriberi is caused by poor diet, and discovered that feeding unpolished rice ( instead of the polished variety ) to chickens helped to prevent beriberi.

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 Eijkman (; 11 August 1858 – 5 November 1930 ) was a Dutch physician and professor of physiology whose demonstration that beriberi is caused by poor diet led to the discovery of vitamins.

In this way medical officer Christiaan Eijkman was seconded as assistant to the Pekelharing-Winkler mission, together with his colleague M. B. Romeny.

This proposal was readily accepted, and Christiaan Eijkman was appointed its first Director, at the same time being made Director of the " Dokter Djawa School " ( Javanese Medical School ) which later become University of Indonesia.

* Lodewijk Palm, Christiaan Eijkman 1858-1930 In: K. van Berkel, A. van Helden and L. Palm ed., A history of Science in the Netherlands.

* NNDB, Christiaan Eijkman

* Nobel Prize. org, Christiaan Eijkman, Nobel Laureate

* Christiaan Eijkman – Biography

* A. M. Luyendijk-Elshout, Eijkman, Christiaan ( 1858 – 1930 ), in Biografisch Woordenboek van Nederland.

Christiaan Neethling Barnard ( 8 November 1922 – 2 September 2001 ) was a South African cardiac surgeon who performed the world's first successful human-to-human heart transplant.

The mathematical description was derived in 1659 by Dutch physicist Christiaan Huygens.

It was designed by architect Louis Christiaan Kalff, while the exhibition was conceived by James Gardner.

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

Christiaan Huygens, prior to Newton, had hypothesized that light was a wave propagating through an aether, but Newton rejected this idea.

This phenomenon was first observed by Christiaan Huygens in 1665.

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.

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.

The pendulum clock was invented in 1656 by Dutch scientist Christiaan Huygens, and patented the following year.

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 ).

This cosmology was accepted by Isaac Newton, Christiaan Huygens and later scientists.

The idea of duality originated in a debate over the nature of light and matter that dates back to the 17th century, when competing theories of light were proposed by Christiaan Huygens and Isaac Newton: light was thought either to consist of waves ( Huygens ) or of particles ( Newton ).

The earliest comprehensive theory of light was advanced by Christiaan Huygens, who proposed a wave theory of light, and in particular demonstrated how waves might interfere to form a wavefront, propagating in a straight line.

Christiaan Huygens, FRS ( or ; ; 14 April 1629 – 8 July 1695 ) was a prominent Dutch mathematician, astronomer, physicist and horologist.

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.

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.

His place was taken by acting president J. Christiaan Heunis.

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

He was secretary to two Princes of Orange: Frederick Henry and William II, and the father of the scientist Christiaan Huygens.

Constantijn Huygens was born in The Hague, the second son of Christiaan Huygens ( senior ), secretary of the Council of State, and Susanna Hoefnagel, niece of the Antwerp painter Joris Hoefnagel.

A week later he was buried in the Grote Kerk in the Hague, together with his son, the famous scientist Christiaan Huygens.

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.