William Boeing

William Edward Boeing (1881-1956) was an American industrialist, founder of the Boeing Airplane Company in 1917. Short Biohraphy: It's military aircraft include the flying fortress...

Pierre Louis Dulong

Pierre Louis Dulong (1785-1838) was a French chemist and physicist who, along with Petit, discovered in 1819 the law that, for many elements solid at room temperature, the product of...

Rene Dubos

Rene Jules Dubos (1901-1981) was a French-US microbiologist and forerunner of Alexander Fleming. Short Biography: Dubos studied soil microorganisms and became interested in their...

Christian Doppler

Christian Johann Doppler (1803-1853) was a Austrian physicist. He became professor of experimental physics at Vienna. Short Biography: He described the Doppler effect, the change...

Ian Donald

Ian Donald (1910-1987) was a English obstetrician who introduced ultrasound (very high frequency sound waves) scanning. Short Biography: He pioneered its use in obstetrics as...

Gerhard Domagk

Gerhard Domagk (1895-1964) was a German pathologist, discoverer of antibacterial drugs. Short Biography: He found that a dye substance called prontosil red contains chemicals...

Richard Dedekind

Richard Dedekind (1831-1916) was a German mathematician who made contributions to number theory. Short Biography: In 1872, he introduced the Dedekind cut (which divides a line...

Peter Debye

Peter Debye (1884-1966) was a Dutch physicist. Short Biography: A pioneer of X-ray powder crystallography, he also worked on polar molecules, dipole moments, and molecular structure....

Humphry Davy

Humphry Davy (1778-1829) was a English chemist. Short Biography: As a laboratory assistant in Bristol in 1799, he discovered the respiratory effects of laughing gas (nitrous...

Clinton Davisson

Clinton Davisson (1881-1958) was an American physicist. Short Biography: With Lester Germer (1896-1971), he discovered that electrons can undergo diffraction, so proving Louis...

Henrik Dam

Carl Peter Henrik Dam (February 21, 1895 – April 17, 1976) was a Danish biochemist who discovered vitamin K. Short Biography: For his success in this field he shared the 1943...

John Dalton

John Dalton (1776-1844) was a British chemist, the first in modern times to propose the existence of atoms, which he considered to be the smallest parts of matter. Short Biography...

Nicolas-Joseph Cugnot

Nicolas Cugnot (1728-1804) was a French engineer who produced the first high-pressure steam engine. Short Biography: While serving in the French army, he was asked to design...

Samuel Crompton

Samuel Crompton (1753-1827) was a British inventor at the time of the Industrial Revolution. Short Biography: He invented the 'spinning mule' in 1779, combining the ideas of...

Nicolaus Copernicus

Nicolaus Copernicus (1473-1543) was a Polish astronomer, who believed that the Sun, not Earth, is at the centre of the solar system, thus defying established doctrine. Short Biography...

Leon Cooper

Leon Cooper (born in 1930) is an English physicist who in 1955 began work on the puzzling phenomenon of superconductivity (very high conductivity at very low temperature). Short...

Arthur Compton

Arthur Holly Compton (1892-1962) was an American physicist known for his work on X-rays. Short Biography: Working at Chicago in 1923 he found that X-rays scattered by such light...

Realdo Colombo

Matteo Realdo Colombo (c. 1516-1559) was an Italian anatomist who discovered pulmonary circulation, the process of blood circulating from the heart to the lungs and back. Short Biography...

John Cockcroft

John Douglas Cockcroft (1897-1967) was a British physicist. Short Biography: In 1932, he and E. T. S. Walton succeeded in splitting the nucleus of the atom for the first time....

Michel-Eugene Chevreul

Michel-Eugene Chevreul (1786-1889) was a French chemist who studied the composition of fats and identified a number of fatty acids, including "margaric acid", which became the basis...

Frederick Lindemann

Frederick Alexander Lindemann, 1st Viscount Cherwell (1886-1957) was a British physicist. Short Biography: He was director of the Physical Laboratory of the RAF at Farnborough...

Pavel Cherenkov

Pavel Cherenkov (1904-1990) was a Soviet physicist. Short Biography: In 1934, he discovered Cherenkov radiation; this occurs as a bluish light when charged atomic particles pass...

Emilie du Chatelet

Emilie de Breteuil Chatelet (1706-1749) was a French scientific writer, mistress of Voltaire, and translator into French of Newton's Principia. Short Biography: Her marriage to...

Jean-Martin Charcot

Jean-Martin Charcot (1825-1893) was a French neurologist who studied diseases of the nervous system. Short Biography: He became known for his work on hysteria, sclerosis, locomotor...