Columbia Encyclopedia

Search results

500 results found

Hobart, city, United States

(Encyclopedia)Hobart hōˈbərt [key], city (2020 pop. 27,817), Lake co., extreme NW Ind.; settled c.1849, ...

Green, George

(Encyclopedia)Green, George, 1793–1841, English mathematician and physicist. He was largely self-taught until, in 1833, he entered Caius College, Cambridge. In addition to making a number of contributions to the ...

conduction

(Encyclopedia)conduction, transfer of heat or electricity through a substance, resulting from a difference in temperature between different parts of the substance, in the case of heat, or from a difference in elect...

Lamesa

(Encyclopedia)Lamesa ləmēˈsə [key], city (1990 pop. 10,809), seat of Dawson co., NW Tex., in the Llano Estacado; inc. 1917. Lamesa is a processing and shipping center for an irrigated area where cattle and hogs...

Geissler tube

(Encyclopedia)Geissler tube gīsˈlər [key], gas discharge tube in which light is produced when an electric discharge passes through the rarefied gas in the tube. The color of the glow depends on the gas used. The...

Einthoven, Willem

(Encyclopedia)Einthoven, Willem vĭlˈəm īntˈhōvən [key], 1860–1927, Dutch physiologist, b. Java, M.D. Univ. of Utrecht, 1885. He was professor at the Univ. of Leiden from 1886. To measure the electric curre...

electrophorus

(Encyclopedia)electrophorus, device used to generate static electric charges. It has two parts: a nonconducting plate (e.g., of hard rubber) that is negatively charged and a metal plate with an insulated handle. A ...

Compton, Karl Taylor

(Encyclopedia)Compton, Karl Taylor, 1887–1954, American physicist, b. Wooster, Ohio, grad. College of Wooster (Ph.B., 1908), Princeton (Ph.D., 1912); brother of A. H. Compton. He taught at Princeton from 1915 to ...

Boulder, city, United States

(Encyclopedia)Boulder, city (2020 pop. 330,758), seat of Boulder co., N central Colo.; inc. 1871. A Rocky Mountain resort and a suburb of Denver, it is the seat of th...

Villard, Henry

(Encyclopedia)Villard, Henry vĭlärdˈ [key], 1835–1900, American journalist and financier, b. Germany. His first name was originally Hilgard. He attended universities in Germany, and after he reached (1853) the...