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Robert I, duke of Normandy
(Encyclopedia)Robert I (Robert the Magnificent), d. 1035, duke of Normandy (1027–35); father of William the Conqueror. He is often identified with the legendary Robert the Devil. He aided King Henry I of France a...Robert the Devil
(Encyclopedia)Robert the Devil, hero of a medieval legend. He was sold to the devil by his mother before his birth but upon discovering the fact did penance and was able to purify himself of his many sins. The tale...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...hydrotherapy
(Encyclopedia)hydrotherapy, use of water in the treatment of illness or injury. Although the medicinal and hygienic value of water was recognized by the early Greeks, hydrotherapy attained its widest use in the 18t...Wolff, Christian von
(Encyclopedia)Wolff or Wolf, Christian von krĭsˈtyän fən vôlf [key], 1679–1754, German philosopher. One of the first to use the German language instead of Latin, he systematized and popularized the doctrines...tetraethyl lead
(Encyclopedia)tetraethyl lead tĕtˌrəĕthˈəl [key], (C2H5)4Pb, viscous, colorless, poisonous liquid. It is an organometallic compound prepared by reacting ethyl chloride with a sodium-lead alloy. When added to ...Houdin, Jean Eugène Robert
(Encyclopedia)Houdin, Jean Eugène Robert or Jean Eugène Robert-Houdin zhäN özhĕnˈ rōbĕrˈ o͞odăNˈ [key], 1805–71, French conjurer and magician. Originally a clockmaker, he was celebrated for his optica...Robert the Strong
(Encyclopedia)Robert the Strong, d. 866, French warrior, marquess of Neustria; father of the French kings Eudes and Robert I and ancestor of the Capetians. He joined the rebellious nobles against Charles II, Empero...Manning, Robert
(Encyclopedia)Manning, Robert: see Mannyng, Robert. ...Parsons, Robert
(Encyclopedia)Parsons, Robert: see Persons, Robert. ...Browse by Subject
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