Page:Encyclopædia Britannica, Ninth Edition, v. 25.djvu/233

H Y D H Y T

219

Xix. 48; spectrum of, xxn. 375 ;

thermometric properties of, XI. 574. HYDROGENS, Phosphuretted, xvm.8i7. HYDROGRAPHIC DEPARTMENT, of the

British Admiralty, xvn. 262. H YDROKINETER, for steam boilers, xxn.

500.

HYDROMAGNESITE, mineral, xvi. 399. HYDROMECHANICS, Science of, xn.

435- HYDROMEDUS/E, subclass of Hydrozoa,

xii. 559.

HYDROMEL, fermented drink from honey, xn. 137.

HYDROMETER, for determining densi ties, xii. 536.

HYDROPARASTAT^, or Aquarians, early Christian sect, II. 217.

HYDROPATHY, system of medical treat ment, xii. 542; in. 438, 440.

HYDROPHANE, mineral, xvi. 390.

HYDROPHID^E, family of snakes, xxn.

193, 197-

HYDROPHITE, mineral, xvi. 415. HYDROPHOBIA, disease, xn. 545; xx.

199.

HYDROPHYTA, order of plants, i. 507. HYDRORHACHIS, bodily deformity, xvi.

763- HYDROSTATIC PARADOX, as basis for

perpetual motion, xvni. 554. HYDROSTATICS, xn. 435, 440 ; place

of, among the sciences, Xix. 2;

figure of the earth as a problem in,

VII. 600.

HYDROTALCITE, mineral, xvi. 388. HYDROTROPISM, in plants, xix. 60. HYDROXIDES, in chemistry, v. 485. HYDROZINCITE, mineral, xvi. 399. HYDROZOA, division of animal kingdom,

xii. 547. HYDRUNTUM, or Hydrus (Otranto),

ancient Greek town, Italy, XVIII. 68. HYERES, town, France, xn. 565; popula tion, xxiv. 69.

HYETOMETER, rain gauge, xx. 256. HYETOMETROGRAPH, Hermann s, xx.

257.

HYGIENE, xn. 566; naval, xvn. 297. HYGINUS, Caius Julius, Roman author,

xn. 569. GROMATICUS, writer on surveying,

xii. 569. HYGROMETER, Amonton s, i. 746;

Deluc s, VII. 54; Saussure s, VII. 54;

xxi. 324.

HYGROMETRY, measurement of humi dity, xii. 569; of atmosphere, in. 32. HYGROPHILITE, mineral, xvi. 425. HYKSOS, shepherd kings, Egypt, vn.

735-

HYLACTES, genus of birds, xxm. 49. HYLO BATES, genus of apes, n. 150. HYLOZOISM, Stoic doctrine of, xxil.

563-

HYMEN, in Greek legend, xii. 571. HYMEN^EUS, in Greek legend, xn. 571.

HYMENIUM, in reproductive system of

lichens, xiv. 554, HYMENOMYCETES, suborder of Fungi,

ix. 832; xxiv. 127; as parasites, xvni.

267. HYMENOPTERA, order of insects, xn.

571; ii. 94; xin. 148. HYMETTUS, mountain, Greece, in. 58;

honey of, xn. 138. HYMNS, xii. 577; musical history of,

xvn. 85; Assyrian, in. 191. HY NEILL, early Irish dynasty, Xin.

250. HYOID BONE, Anatomy of the, I.

825. HYOSCYAMINE, vegetable alkaloid, xi.

651. HYOSCYAMUS, genus of plants, xi. 650;

xvn. 231.

HYP^ETHROS, in architecture, n. 466. HYPATIA of Alexandria, Pagan martyr,

xn. 596; xvn. 337; her scientific

treatises, I. 511; her death attributed

to Cyril, vi. 751.

- , C. Kingsley s novel, xiv. 89. IA, disease, xin. 100.

HYPERBOLA, in geometry, vi. 278; x.

398; mensuration of, xvi. 20. HYPERBOLIC ANTILOGARITHMS, Tables

of, xxm. 14. HYPERBOLIC LOGARITHMS, Tables of,

XXIII. 12.

HYPERBOLIC TRIGONOMETRY, xxm.

570. HYPERBOLOID, Mensuration of the, xvi.

27.

HYPERGEUSIA, disease, xxm. 80. HYPERIDES, Attic orator, xn. 596;

ancient MS. of, xvni. 146. HYPERIDROSIS, skin disease, xxn.

1 20.

HYPERION, Holderlin s work, xn. 58. - , Keats s poem, xiv. 23.

-, Longfellow s work, xiv. 860.

HYPERMETROPIA, defect of the eye,

vni. 820; xvn. 785; spectacles for,

xxn. 372. HYPEROODON, genus of Cetacea, xv.

396; xxiv. 525. HYPERPARASITISM, xvni. 261. HYPERPYREXIA, disease, xx. 517. HYPERSTHENE, mineral, xvi. 415. HYPERTROPHY, abnormal increase of

bodily organs, xn. 597; xxn. 687. HYPH^E, cells of Fungi, ix. 827. HYPH^NE, genus of palms, xvni.

190. HYPHASIS (Sutlej), eastern limit

reached by Alexander, I. 484. HYPHEAR, parasitic plant, xvi. 527. HYPNOSIA, disease, xxn. 157. HYPNOTICS, narcotic drugs, xvn. 230. HYPNOTISM, 11. 205; xv. 277; among

the Greeks, II. 505. HYPOBLAST, in animal development, n.

51; vni. 746; xxn. 106. HYPOCAUST, Roman stove, xxn. 579.

HYPOCHONDRIASIS, disease, xn. 598. HYPODERMA, in vegetable histology,

Xii. 18. HYPODERMIC, order of Fungi, ix.

831- HYPOGENE ACTION, in geology, x.

240.

HYPOGEOMYS, genus of rodent mam mals, xvn. 6.

HYPOGEUSIA, disease, xxm. 80. HYPOLAIS, genus of birds, xxiv. 553. HYPOMESUS, genus of fishes, xxi. 221,

224.

HYPONITROUS ACID, v. 514. HYPOSTASIANISM, early Christian

dogma, xvi. 719.

HYPOSTILBITE, mineral, xvi. 422. HYPOTHEC, in law, xn. 598; xx. 403;

its effects on agriculture, I. 407. HYPOTHECIUM, in reproductive system

of lichens, xiv. 554. HYPOTRICHA, order of Protozoa, xix.

863. HYPOTYPOSES, Clement of Alexandria s

work, v. 820.

HYPOXANTHITE, mineral, xvi. 425. HYPOZOA, or Protozoa (q.v.), Skeletal

structures of, xxn. 106. H YPSILANTES, or Hypsilanti, Alexander,

modern Greek leader, XI. 125; xxm.

649. HYPSIPRYMNODON, genus of marsupial

mammals, xin. 841. HYPSIPRYMNUS, genus of marsupial

mammals, xin. 840. HYPSIPYLE, of Greek legend, xiv.

437-

HYPSOMETER, boiling-point thermo meter, xxm. 292. HYPSOMETRY, determinations of height,

in surveying, xxn. 713. HYRACODON, extinct ungulate mammal,

xv. 428; xx. 523. HYRACOIDEA, suborder of ungulate

mammals, xv. 422. HYRAX, genus of ungulate mammals,

xii. 598; xv. 423. HYRCANIA, province, Western Asia,

xn. 599; xvni. 586, 588, 592, 603. HYRCANUS, John, I.-II., Jewish high

priests, xii. 599; xin. 423. HYSMINE AND HYSMINIAS, Greek

romance, xx. 636. HYSON, variety of tea, xxm. 99. HYSSOP, plant, xn. 599, 289. HYSTERECTOMY, in surgery, xxn.

691. HYSTERIA, disease, xn. 600; xin. 101,

1 08.

HYSTERO-EPILEPSY, disease, xn. 601. HYSTRICOMORPHA, HYSTRICID^E, sec tion and family of rodent mammals,

xv. 420. HYSTRIX, genus of rodent mammals,

xn. 416; xix. 518. HYTHE, town, England, xn. 601; xiv.