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Nicholas I, czar of Russia

(Encyclopedia)Nicholas I, 1796–1855, czar of Russia (1825–55), third son of Paul I. His brother and predecessor, Alexander I, died childless (1825). Constantine, Paul's second son, was next in succession but ha...

Nicholas II, czar of Russia

(Encyclopedia)Nicholas II, 1868–1918, last czar of Russia (1894–1917), son of Alexander III and Maria Feodorovna. Discontent at home grew, the army tired of war, the food situation deteriorated, the governme...

Nicholas I, king of Montenegro

(Encyclopedia)Nicholas I, 1841–1921, prince (1860–1910) and king (1910–18) of Montenegro, successor of his uncle, Danilo II. In 1862, after a series of frontier incidents, Nicholas was forced into war with th...

Biddle, Nicholas, American naval officer

(Encyclopedia)Biddle, Nicholas, 1750–78, American naval officer, b. Philadelphia. Biddle left the British navy in 1773. In the American Revolution he became captain in the patriot navy and daringly raided British...

copernicium

(Encyclopedia)copernicium, artificially produced radioactive chemical element; symbol Cn; at. no. 112; mass number of most stable isotope 285; m.p., b.p., sp. gr., and valence unknown. Situated in Group 12 of the p...

Eudoxus of Cnidus

(Encyclopedia)Eudoxus of Cnidus yo͞odŏkˈsəs, nīˈdəs [key], 408?–355? b.c., Greek astronomer, mathematician, and physician. From the accounts of various ancient writers, he appears to have studied with Plat...

Vansittart, Nicholas, 1st Baron Bexley

(Encyclopedia)Vansittart, Nicholas, 1st Baron Bexley vănˈsĭtärt [key], 1766–1851, British politician. He entered Parliament in 1796, was joint secretary of the treasury (1801–4, 1806–7) and briefly secret...

Ptolemy

(Encyclopedia)Ptolemy (Claudius Ptolemaeus), fl. 2d cent. a.d., celebrated Greco-Egyptian mathematician, astronomer, and geographer. He made his observations in Alexandria and was the last great astronomer of ancie...

Dodge, Mary Mapes

(Encyclopedia)Dodge, Mary Mapes, 1831–1905, American writer of children's stories, b. New York City. During her lifetime she was the acknowledged leader in the field of juvenile fiction. Her story Hans Brinker; o...

Constantine, Russian grand duke

(Encyclopedia)Constantine (Konstantin Pavlovich) kənstəntyēnˈ pävˈləvĭch [key], 1779–1831, Russian grand duke, second son of Czar Paul I and brother of Alexander I and Nicholas I. On the death of Alexande...