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Great Falls

(Encyclopedia)Great Falls, city (2020 pop. 60,442), seat of Cascade co., N central Mont., second largest city in the state, at the confluence of the Missouri and Sun ...

Erie, city, United States

(Encyclopedia)Erie, city (2020 pop. 94,831), seat of Erie co., NW Pa., on Lake Erie; inc. as a city 1851. Pennsylvania's only port on the Great Lakes, Erie is a busy ...

hydrogen sulfide

(Encyclopedia)hydrogen sulfide, chemical compound, H2S, a colorless, extremely poisonous gas that has a very disagreeable odor, much like that of rotten eggs. It is slightly soluble in water and is soluble in carbo...

Jones, Mary Harris

(Encyclopedia)Jones, Mary Harris, 1830–1930, American labor agitator, called Mother Jones, b. Ireland. Interested in the labor movement for many years, she became active in it after the death of her husband and f...

Don, river, Russia

(Encyclopedia)Don dŏn, Rus. dôn [key], river, SW European Russia. It rises SE of Tula and flows c.1,200 mi (1,930 km), first SE past Voronezh, then SW into the Sea of Azov. At its eastern bend the Don is linked b...

Concepción

(Encyclopedia)Concepción kōnsĕpsēōnˈ [key], city, capital of Biobío region, S central Chile, near the ...

coonhound, black-and-tan

(Encyclopedia)coonhound, black-and-tan, breed of large hound developed in the United States. It stands from 23 to 27 in. (58–69 cm) high at the shoulder and weighs from 70 to 85 lb (32–38 kg). The dense, short ...

New Britain, island, Papua New Guinea

(Encyclopedia)New Britain, volcanic island (1990 pop. 315,649), c.14,600 sq mi (37,810 sq km), SW Pacific, largest island of the Bismarck Archipelago and part of Papua New Guinea, in which it forms two provinces (E...

pyridine

(Encyclopedia)pyridine ăzˈēn [key], C5H5N, colorless, flammable, toxic liquid with a putrid odor. It melts at −42℃ and boils at 115.5℃. Chemically, it is a heterocyclic aromatic tertiary amine (see under a...

Novosibirsk

(Encyclopedia)Novosibirsk nôˌvəsĭbērskˈ [key], city (1989 pop. 1,437,000), capital of Novosibirsk region and the administrative center of the Siberian federal district, S Siberian Russia, on the Ob River and ...