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    Johann Friedrich Pfaff, Mathematician  
Johann Friedrich Pfaff was a German mathematician. He was described as one of Germany's most eminent mathematicians during the 19th century. He studied integral calculus, and is noted for his work on partial differential equations of the fi...
 
    Malthus, Principle of Population  
The Reverend Thomas Robert Malthus was a British scholar, influential in political economy and demography. Malthus popularized the economic theory of rent. Malthus has become widely known for his theories about population and its increase o...
 
    John Dalton, First Useful Atomic Theory  
John Dalton was an English chemist, meteorologist and physicist. He is best known for his pioneering work in the development of modern atomic theory, and his research into colour blindness. He developed the first useful atomic theory of...
 
    Georges Cuvier, French Naturalist  
Georges Cuvier was a renowned French naturalist and zoologist considered the founder of comparative anatomy and vertebrate paleontology. He originated a system of zoological classification that comprised four phyla based on differences in s...
 
    Alexander von Humboldt, Naturalist  
Alexander von Humboldt was a German naturalist and explorer, and the younger brother of the Prussian minister, philosopher, and linguist, Wilhelm von Humboldt (1767-1835). Humboldt's quantitative work on botanical geography was foundational...
 
    Manuel Belgrano, Liberator Argentina  
Manuel José Joaquín del Corazón de Jesús Belgrano, usually referred to as Manuel Belgrano, was an Argentine economist, lawyer, politician, and military leader. He took part in the Argentine Wars of Independence and created the Flag of Argen...
 
    David Thompson, Canadian Explorer  
David Thompson was an English-Canadian fur trader, surveyor, and map-maker, known to some native peoples as "Koo - Koo - Sint" or "the Stargazer". Over his career he mapped over 3.9 million square kilometres of North America and for this ha...
 
    Du Pont, Founder DuPont Company - 1802  
Among the young men whom Antoine-Laurent Lavoisier deeply influenced was Eleuthère Irénée du Pont (1771–1834), the founder of the DuPont Company. His father, Pierre Samuel du Pont—an economist, government official, and publicist—was among t...
 
    Saint-Hilaire, Naturalist  
Étienne Geoffroy Saint-Hilaire was a French naturalist who established the principle of "unity of composition". He was a colleague of Jean-Baptiste Lamarck and expanded and defended Lamarck's evolutionary theories. Geoffroy's scientific vie...
 
    George Cayley, Father of Aviation  
Sir George Cayley, 6th Baronet was a prolific English engineer and one of the most important people in the history of aeronautics. Many consider him the first true scientific aerial investigator and the first person to understand the underl...
 
    Robert Brown, British Botanist  
Robert Brown, Scottish botanist and botanical explorer. In 1801 he went as a naturalist on one of Matthew Flinders's expeditions to Australia, returning (1805) to England with valuable collections. In his Prodromus florae Novae Hollandiae e...
 
    Francis Beaufort, Wind Force Scale  
Rear-Admiral Sir Francis Beaufort, was a hydrographer and officer in Britain's Royal Navy. Beaufort was the creator of the Beaufort scale for indicating wind force. Sir Francis Beaufort's father, Daniel Augustus Beaufort, was a Protestant c...
 
    Ampere, Father of Electrodynamics  
André-Marie Ampère was a French physicist and mathematician who is generally regarded as one of the main founders of the science of classical electromagnetism, which he referred to as "electrodynamics". The SI unit of measurement of electri...
 
    Amedeo Avogadro, Italian Chemist  
In 1811 Amedeo Avogadro hypothesized that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules. From this hypothesis it followed that relative molecular weights of any two gases are the same as the...
 
    Hans Christian Ørsted, Physicist  
Hans Christian Ørsted (often rendered Oersted in English;) was a Danish physicist and chemist who discovered that electric currents create magnetic fields, an important aspect of electromagnetism. He shaped post-Kantian philosophy and advan...
 
       
         
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