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Billings, John Shaw

(Encyclopedia)Billings, John Shaw, 1838–1913, American surgeon and librarian, b. Indiana. In the Civil War he was medical inspector of the Army of the Potomac. After the war he was given charge of the Surgeon Gen...

Wheeling

(Encyclopedia)Wheeling. 1 Village (1990 pop. 29,911), Cook co., NE Ill., a suburb of Chicago; founded c.1830, inc. 1894. Machinery, computer supplies, metal and paper products, security devices, insulation, and che...

blood test

(Encyclopedia)blood test, examination of blood routinely or as an aid in diagnosing a suspected disease. Tests may be performed on whole blood or on the plasma portion only. Blood typing identifies the proteins at ...

Bengaluru

(Encyclopedia)Bengaluru băng-gəlôrˈ [key], city (2021 pop. 5,104,047; est. pop. metropolitan area 12,327,000), ...

electric circuit

(Encyclopedia)CE5 A. Series circuit: Current is the same through each resistance; voltage divides in direct proportion to each resistance. B. Parallel circuit: Voltage drop is the same over each resistance; curr...

communication

(Encyclopedia)communication, transfer of information, such as thoughts and messages, as contrasted with transportation, the transfer of goods and persons (see information theory). The basic forms of communication a...

observatory

(Encyclopedia)observatory, scientific facility especially equipped to detect and record naturally occurring scientific phenomena. Although geological and meteorological observatories exist, the term is generally ap...

combinatorics

(Encyclopedia)combinatorics kŏmˌbĭnətôrˈēəl [key], sometimes called the science of counting, the branch of mathematics concerned with the selection, arrangement, and operation of elements within sets. Combi...

cognitive psychology

(Encyclopedia)cognitive psychology, school of psychology that examines internal mental processes such as problem solving, memory, and language. It had its foundations in the Gestalt psychology of Max Wertheimer, Wo...

programmed instruction

(Encyclopedia)programmed instruction, method of presenting new subject matter to students in a graded sequence of controlled steps. Students work through the programmed material by themselves at their own speed and...