HEWLETT ( HEWLETT, MAURICE HENRY, an English novelist and poet; born in Lon- don, Jan. 22, 1861. Educated at London International College, and admitted to the bar in 1891. From 1896 to 1900 he served as Keeper of Land Revenue Records and Enrolments, a post which his father Henry Gay Hevi^lett had filled before him. He first gained interna- tional reputation with a brilliant me- dieval romance, "The Forest Lovers" (1898), and followed that with several other tales of olden times notable for creative imagination and rare beauty of style. His books include: "Songs and Meditations," poems (1896) ; "The For- MAURICE H. HEWLETT est Lovers" (1898) ; "Pan and the Young Shepherd" (1898); "Little Novels of Italy" (1899); "Richard Yea-and-Nay" (1900) ; "New Canterbury Tales" (1901); "The Queen's Quair" (1904); "The Road in Tuscany" (1904) ; "Fond Adventures" and "The Fool Errant" (1905); "The Stooping Lady" (1907); "The Spanish Jade" and "Halfway House" (1908) ; "Open Country" (1909) ; •Rest Harrow" (1910); "The Agonists" (1911) ; "Mrs. Lancelot" (1912) ; "Bend- Ish" (1913); "A Lovers' Tale" (1915); "The Little Iliad" (1915); "The Song of the Plow" (1916); "Peridore and Para vail" (1917); etc. HEXACHORD, in ancient music, an interval of four tones and one semitone, equivalent to that which the moderns call a sixth. HEXAGONAL SYSTEM, in crystal- lography and mineralogy, one of the HEXYL ALCOHOLS six great systems of crystallization. It agrees with the tetragonal system in having only the lateral axes equal, but differs in having three equal lateral axes instead of two. The vertical is at right angles to the lateral one. The sym- metry of the crystals is by sixes and twelves. HEXAHEDRON, a figure having six faces, or a solid bounded by six planes. The term cube is now generally applied to the regular hexahedron. HEXAMETER (-am'e-tur) , the heroic verse of the Greeks and Romans. As its name implies, it consists of six feet, properly dactyls, the last of which is shortened by one syllable, and so becomes a trochee, or, as the final syllable is long by position, a spondee. HEXANE, in chemistry, CeHu, five isomeric hydrocarbons exist. (1) Nor- mal hexane. Dipropyl, CHsCH^CH;- CH2CH2CH3. It occurs in the light oils obtained by the distillation of cannel coal, also in petroleum. It can be obtained by the action of sodium and normal propyl iodide, CsHtI, or by the action of zinc and hydrochloric acid on secondary hexyl iodide (from mannite), and by distilling suberic acid with baryta, CgH«04 + 2BaO = 2BaC03 + CoH,i. It boils at 71°. (2) Propyl dimethyl methane, or_ propyl isopropyl, ethyl isobutyl, obtained by the action of sodium on a mixture of ethyl iodide and isobutyl iodide. HEXHAM, a town of England, in Northumberlandshire, on the Tyne, about 20 miles W. from Newcastle. It has ruins of an abbey church, originally a cruciform structure, built about 674, destroyed two centuries later by the Danes, renovated in 1113, and demol- ished by the Scots in 1296. The Battle OF Hexham, fought May 15, 1464, was one of those belonging to the Wars of the Roses. Pop. about 9,000. HEXOIC (o'ik), in chemistry, C^Hu- CO OH, fatty acids of the acetic series, containing six carbon atoms. Eight of these acids are possible. HEXYL ALCOHOLS, in chemistry, monatomic alcohols having the formula CeHis (OH). Seventeen alcohols can exist, eight primary, six secondary, and three tertiary. Normal hexyl-alcohol, (CHs (CHO4CH.OH. It is obtained from the essential oil of Heracleum gi- ganteum, where it exists as hexyl- butyrate, along with octyl-acetic ; the oil is saponified by alcoholic potash, and then fractionally distilled. The hexyl- alcohol boils at 157°.
