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Collins, Anthony

(Encyclopedia)Collins, Anthony, 1676–1729, English theologian; a friend of John Locke. He set forth the position of the deists and defended the cause of rational theology. His Discourse of Free Thinking (1713) wa...

Schleiden, Matthias Jakob

(Encyclopedia)Schleiden, Matthias Jakob mätēˈäs yäˈkôp shlīˈdən [key], 1804–81, German botanist. He was professor at the universities of Jena (1839–63) and Dorpat (1863–64). With Theodor Schwann, he...

Planck's constant

(Encyclopedia)Planck's constant plängks [key], fundamental constant of the quantum theory. It is represented by the letter h and has a value of 6.62607 × 10−34 joule-second. The combination h/2π, denoted by h ...

quaestor

(Encyclopedia)quaestor kwĕsˈtôr [key], Roman magistrate, with responsibility for the treasury; in early times a quaestor also had judicial powers. At first there were two quaestors. Sulla named 20, and Caesar se...

Nollet, Jean Antoine

(Encyclopedia)Nollet, Jean Antoine zhäN äNtwänˈ nôlāˈ [key], 1700–1770, French clergyman, experimental physicist, and leading member of the Paris Academy of Science. He constructed one of the first electro...

Lorentz, Hendrik Antoon

(Encyclopedia)Lorentz, Hendrik Antoon hĕnˈdrək änˈtōn lōˈrĕnts [key], 1853–1928, Dutch physicist, a pioneer in formulating the relations between electricity, magnetism, and light. He was one of the first...

Kahneman, Daniel

(Encyclopedia)Kahneman, Daniel, 1934–, Israeli-American psychologist, b. Tel Aviv, Ph.D. Univ. of California, Berkeley, 1961. Born to Lithuanian parents, he spent his youth in France, and immigrated to what soon ...

nihilism

(Encyclopedia)nihilism nīˈəlĭzəm [key], theory of revolution popular among Russian extremists until the fall of the czarist government (1917); the theory was given its name by Ivan Turgenev in his novel Father...

Heisenberg, Werner

(Encyclopedia)Heisenberg, Werner vĕrˈnər hīˈzənbĕrk [key], 1901–76, German physicist. One of the founders of the quantum theory, he is best known for his uncertainty principle, or indeterminacy principle, ...

natural rights

(Encyclopedia)natural rights, political theory that maintains that an individual enters into society with certain basic rights and that no government can deny these rights. The modern idea of natural rights grew ou...