HEARING 



293 



HELLEBORE 



French, Pratique. H., Board of, a public body hav- 

 ing charge of the sanitation of a stated district. 



Hearing. (See Illus. Diet.) H., Abnormal. See 

 Diplacusis, Hyper acusy, Paracusis (Illus. Diet.). H., 

 Color, H., Colored. See Audition coloree (Illus. 

 Diet.). H., Double, diplacusis. H., Exalted, 

 hvperacusis. H., Eitelberg's Test. If a large tun- 

 ing-fork be held at intervals before the ear during 15 

 or 20 minutes, the duration of the perception of the 

 vibration, during these periods, increases in case the 

 ear is normal, but decreases when a lesion of the 

 sound-conducting apparatus exists. See also Gardiner- 

 £ fawn's Test, G ruber s Test, and also Gelles Experi- 

 ment, Weber s Experiment (Illus. Diet. ). H., False. 

 See Pseudacusma (Illus. Diet.). 



Heart. (See Illus. Diet. \ H.s, Accessory (of Han- 

 cock), organs in brachiopods described by Hancock as 

 hearts, but regarded by Morse as in some way con- 

 nected with the genitalia. H., Bicycle, cardiac dis- 

 ease due to excessive use of the bicycle. H., Blocked, 

 a condition due to stoppage of some of the auricular 

 contractions at the auriculoventricular boundary. H., 

 Body. See H., Left. H., Dicelious. See Cor 

 biloculare (Illus. Diet.). H., Fibroid. See under 

 Fibroid (Illus. Diet.). H., Hairy. See Cor villosum 

 (Illus. Diet.), H., Hepatic, cardiac disturbance 

 secondary to some hepatic affection. H., Icing, 

 Eichhorst's name for a heart the whole surface of which 

 is covered with a dense, thick, marble-white tissue. 

 H., Irritable, a peculiar cardiac excitability found to 

 exist among soldiers in the field, marked by pain, 

 lpitation, dyspnea, and rapid pulse ; it has been 

 ribed to muscular exhaustion. H., Left, the left 

 chambers of the heart. H., Liftman's. See Disease. 

 Elevator. H., Low, Janeway's term signifying a low 

 position of the heart due to anatomic conditions, not to 

 disease. Syn., Eathycardia. H., Luxus, applied 

 by the Germans to a condition in which a primary 

 dilation of the heart is followed by hypertrophy of 

 the left ventricle ; often found in gourmands. H., 

 Peripheral, a term applied to the muscular coat of the 

 bloodvessels other than the heart. H., Skin. See//., 

 Peripheral. H., Systemic, the left chambers of the 

 heart which propel aerated blood. H., Tobacco. See 

 under Tobacco (Illus. Diet.). H., Tricelious, H., 

 Trilocular, H., Tripartite, H., Univentricular, a 

 heart with only three cavities, two auricles and one 

 ventricle ; it is normal in the Patrachia. H-, Typhoid, 

 overdistention and laceration of the bloodvessels of the 

 heart with atrophy of the muscle-fibers, due to typhoid 

 fever. H., Villous. See Cor villosum (Illus. Diet.). 

 H. -water, a disease of sheep and goats characterized by 

 the appearance of large quantities of clear yellow fluid 

 in the pericardial sac and also in the pleural and peri- 

 toneal cavities. It has not been thoroughly investi- 

 gated, but it has all the characteristics of a specific dis- 

 ease. Its transmission and perpetuation are due to the 

 bont-tick (Amblyomma hebrieum\. 



Heautophonics (he-ah-to-fon'-iks). See Autophonv 

 (Illus. Diet.). 



Hebephrenia. (See Illus. Diet.) H. gravis (Christi- 

 son). Synonym of Dement a pmcox. 



Hebotomy {^heb-otf -6-me) \ji3i), pubes ; rtfjcvtiv, to cut]. 

 Van de Velde's operation of sawing the pelvis in cases 

 of obstructed deliver} - . 



Hecatomeral, Hecatomeric (hek-at-om'-eral, -ik) 

 [imrtpov, each singly; i/epoc, part]. Applied by 

 v. Gehuchten to a neuron the processes of which divide 

 into two parts, one going to each side of the spinal cord. 



Heckel's Prasoide Tincture. .A remedy for gout, con- 

 sisting of globularin and globularetin in proportion of 15- 

 17 cgm. per teaspoonful. Dose, 1-4 teaspoonfuls daily. 



Hedonal (Aed'-on-al). The ester of methyl propylcar- 

 binol-carbamic acid ; a colorless crystalline substance 

 with taste of mint. Soluble in 50^ alcohol. It is 

 recommended as a safe hypnotic in the milder forms of 

 insomnia. Dose, 20-45 S r - ( l -33~ 2 -9 g m 0- 



Hegar's Method of Diagnosing Fibroma. This 

 consists in drawing downward the uterus with a volsel- 

 lum while the finger is passed into the rectum and 

 pressed against the tumor ; if it is ovarian, it will be 

 immovable ; if uterine, there will be great resistance to 

 drawing down the cervix. 



Hegemony {he-jem f -on-e\ \Jp. euuv, a leader]. The 

 supremacy of one function over a number of others. 



Hegovia {he-go* -ve-ah). A proprietary remedy for 

 tnuresis said to consist of salol, powdered snails, and 

 lithium salicylate. 



Heidenhain's Theory of the Origin of Lymph. See 

 under Lymph. 



Helcodermatosis {hel-ko-dur-mat-a' -sis) [e/Koc, ulcer; 

 (ttpua, skin]. Skin-disease with the formation of 

 ulcers. 



Helcosol (hel'-ko-sol). See Eismuth Pyrogallate. 



Helenin. (See Illus. Diet.) Dose, \-\ gr. (0.011- 

 0.022 gm. ). 



We\eo^>\\o\Az.(kel-e-o-fa'-be-ah'). See Helophobia (Illus. 

 Diet.). 



Helexin (hel-eks / -in). A glucosid, C 3 .,H 54 11 , from 

 Hedera helix. 



Heliciform (nel-rV-e-form) [f/.if , a spiral ; forma, form]. 

 Spiral ; shaped like a snail's shell. 



Helicina {h el-is' -in -a In. A mixture of snail mucus and 

 sugar ; a white powder soluble in water and used as a 

 pectoral remedy. Syn., Saccharated snail juice. 



Helicoidin {hel-ik-oid ' -iti). A substance, C J6 H 34 0, 4 , 

 obtained with helicin from salicin by action of nitric 

 acid. 



Helicomonas (hel-ik-o-mo / -nas). See Eacteria, Table 

 0/ (Illus. Diet.). 



Helicoproteid {hel-ik-o-pro'-te-id). A phosphoglyco- 

 proteid obtained from the glands of the snail, Helix 

 pomalia. It is converted by action of alkalis into a 

 gummy, levorotatory carbohydrate called animal sinis- 

 trin. 



Heliophilia (he-le-ofiE-e-ah) [fi'/ioq, sun; <j>i?.Eiv f to 

 love]. Morbid affinity for the sunlight resulting in 

 ecstacy and muscular contraction. Ger., Sonnensucht. 



Heliophobe (he / -le-o-fdb) [/}/.<oc, sun; ^>0/3oc, fear]. 

 One who is morbidly sensitive to the effects of the sun's 

 rays. 



Heliosin (he-le-o / -sin). An antisyphilitic mixture of 

 various inorganic salts with keratin. 



Heliostat (he / -le-o-stat) [tj'/ioc, sun; ora-dc, fixed]. A 

 mirror moved by clockwork in such a manner as to re- 

 flect continuously the sun's rays in a fixed direction. 



Heliotrope. (See Illus. Diet.) 2. A variety of quartz, 

 of a dark-green color with dark-red spots, like drops 

 of blood. Considered by the Aztecs to have the virtue 

 of stopping nose-bleed. 



Heliotropic (he-le-ot'-rop-ik) [7//./0C, sun ; Tpe-zeiv, to 

 turn]. Relating to the movements of protoplasm under 

 the influence of light. 



Helium (he / -le-um) [if/ioc, sun]. A supposed element 

 inferred by a bright line in the solar spectrum, but 

 identified as a terrestrial body by Ramsay in 1895. It is 

 a gaseous body, hoiling below 264 O, which has re- 

 sisted all attempts to liquefy it. It forms compounds 

 with hydrogen, carburetted hydrogen, and nitrogen. 



Helixin (hel-iks'-in). C M H 5t O n (Vernet). A crystal- 

 line substance obtained from Hedera helix, soluble in 

 hot acetone, hot benzene, or in alcohol ; melts at 

 233° C. 



Hellebore, American or Swamp. Veratrum vtnde. 



