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Berthelot, Pierre Eugène Marcelin

(Encyclopedia)Berthelot, Pierre Eugène Marcelin pyĕr ûzhĕnˈ märsəlăNˈ bĕrtəlōˈ [key], 1827–1907, French chemist. He was professor at the École Supérieure de Pharmacie (1859) and at the Collège de ...

Bosch, Carl

(Encyclopedia)Bosch, Carl, 1874–1940, German chemist and engineer, Ph.D. Univ. of Leipzig, 1898. In 1899, Bosch began working as a chemist for BASF, which merged with six other German chemical firms to become I. ...

liqueur

(Encyclopedia)liqueur lĭkûrˈ [key], strong alcoholic beverage made of almost neutral spirits, flavored with herb mixtures, fruits, or other materials, and usually sweetened. The name derives from the Latin word ...

Melbourne, city, Australia

(Encyclopedia)Melbourne, city (2016 pop. 47,285, Greater Melbourne 2016 pop. 4,485,211), capital of Victoria, SE Australia, on Port Phillip Bay at the mouth of the Yarra River. Melbourne, Australia's second largest...

government

(Encyclopedia)government, system of social control under which the right to make laws, and the right to enforce them, is vested in a particular group in society. There are many classifications of government. Accord...

Fahrenheit temperature scale

(Encyclopedia)Fahrenheit temperature scale fârˈənhītˌ [key], temperature scale in which the temperature difference between two reference temperatures, the melting and boiling points of water, is divided into 1...

hydrazine

(Encyclopedia)hydrazine hīˈdrəzēnˌ [key], chemical compound, formula NH2NH2, m.p. 1.4℃, b.p. 113.5℃, specific gravity 1.011 at 15℃. It is very soluble in water and soluble in alcohol. At ordinary tempera...

e, in mathematics

(Encyclopedia)e, in mathematics, irrational number occurring widely in mathematics and science, approximately equal to the value 2.71828; it is the base of natural, or Naperian, logarithms. The number e is defined ...

Taine, Hippolyte Adolphe

(Encyclopedia)Taine, Hippolyte Adolphe tān, Fr. ēpôlētˈ ädôlfˈ tĕn [key], 1828–93, French critic and historian. A brilliant student, he gained recognition with the publication of his doctoral thesis, Ess...

pi

(Encyclopedia)pi, in mathematics, the ratio of the circumference of a circle to its diameter. The symbol for pi is π. The ratio is the same for all circles and is approximately 3.1416. It is of great importance in...