GAILTJS 



139 



GAPERS 



[ Galvanism, q.v. ] 



chiefly of woody fibre, tannin and gallic acid: 

 used in the manufacture of ink, &c. 



Gallus, (gal'lus). [The Latin name.]=Cock: 

 A poultry-like bird, the type of the Galli- 

 naceous family of birds. G. domesticus= 

 Common fowl. G.ferrugineus=3swan cock. 

 G. Temminckii=133ita.vinQ. cock. G. Lafayetii 

 =Ceylon cock. 



Gallyworm. 1. Polydesmus: a worm-like 

 animal, with numerous legs, belonging to 

 Chilognatha. 2. Xylobius sigillariae: found 

 fossil in Acadia. 



Galt=Gault, q.v. 



Galugo, (ga-lu'go). An animal of the bat kind 

 found in Borneo. 



Galvanic, ( gal-van'ik ). 

 Related to galvanism. 

 G. battery: a number of 

 connected galvanic cells 

 G. cell: a combination 

 of two substances in a 

 liquid which acts chemi- 

 cally upon one more 

 than on the other. G. 

 electricity = Chemical Galvanic Battery, 

 electricity. G. shocks : sensations caused by 

 a nerve being connected with an inductive 

 coil charged by a galvanic cell, so that it is 

 affected by the currents. 



Galvanised, (gal'va-nizd). [Galvanism, q.v.] 

 Acted upon by galvanism. G. iron Iron 

 coated with zinc. 



Galvanism, (gal'van-izm). [Sig. Galvani of 

 Bologna] = Chemical electricity = Current 

 electricity = Voltaic electricity : electricity 

 produced by chemical action, when two 

 substances are combined so as to form a 

 galvanic cell. 



Galvanometer, (gal-va-nom'e-ter). [Galvanism 

 and Meter, q. v. ] An apparatus for measuring 

 the intensity of a galvanic current, and in- 

 dicating its direction, usually by means of 

 an astatic couple; also called a multiplier. 

 Differential G. measures the difference in 

 the intensities of two currents. Tangent G. 

 by which the intensity of the current is 

 measured by the tangent of the angle 

 through which the magnetic needle is de- 

 flected. Thomson's G.: a reflecting G. origin- 

 ally designed for use on shipboard, in which 

 the needle carries a mirror, in. which a beam 

 of light is reflected. 



Galvanoscope, (gal-van'o-skop). [Galvanism, 

 q.v.; Gk. s/copeo, I observe.] An instrument 

 to show the presence of a galvanic current 

 and its direction. 



Galvano-thermometer. An instrument for 

 measuring the heating effect of a galvanic 

 current. 



Gambir, (gam'ber). A Chinese shrub, from 

 the leaves of which a dye-stuff is extracted. 



Gamboge, (gam-bo'j). [Cambogia.] CgoHssOia: 

 a gum resin obtained from Garcinia' cam- 

 bogia. 



Gamitana, (gam-i-ta'na). A large flat fish, 

 resembling the skate, found in Peru. 



Gamma Virginis,(gam'ma ver'jin-is). [Gamma 

 and Virgo, q.v.] A double star, of which 

 one alternately approaches and recedes from 



the other. The third star in the constellation 

 Virgo. 



Gammarus, ( gam'ma-rus ). An insect, found 

 in Japan, belonging to Amphipoda. G. pv.lex 

 = Fresh-water shrimp. 



Gamogenesis, (gam-o-jen'e-sis). [Gk. gamos, 

 marriage; Genesis, g.v.]=Sexual reproduc- 

 tion =Homogenesis: occurs when growth is 

 nearly completed or declining, v. Genesis. 

 v. Development. 



Gamopetalae, ( gaui-o-pet'a-le ). [Gk. gamos, 

 marriage; Petal, 5.v.]=Sympetalse: Brong- 

 niart's term for a division of Exogens, be- 

 longing to Angiospermea), the petals of 

 which are united so as to form a tube. 



Gamut=:Gammut. 



Ganglia, (gang'li-a). Plural of ganglion, q.v. 



Ganglion, (gang'li-on). [Gk. ganglion, knot.] 

 A nervous centre 1 an accumulation of nerve- 

 cells, capable of giving and receiving im- 

 pressions 



Ganglioneura, (gang-li-o-nu'ra). [Ganglion, 

 q.v. ; Gk. neuron, nerve.] Ehrenberg's term, 

 for Articulata, Mollusca, and the lower 

 animals generally. 



Ganglionic nervous system = Sympathetic 

 system, q.v. 



Gangrene, (gang'ren). [Gangraina, the Greek 

 word.] The first stage of local death, t>. Mor- 

 tification. 



Gannet, (gan'net). [A.-S. ganet, a sea duck.] 

 :=Sula: a sea-bird, 

 found near land : 

 belonging to Nata- 

 tores. 



Gannister, (gan'nis- 

 ter). A siliceous 



variety of fire-clay. 



Ganocephala, (gan-6- 1 

 sef ' a - la). [ Gk. 

 ganos, brightness ; 

 kephale, head.] A 

 family of reptiles, 

 belonging toDipnoa, 

 allied to Ganoid Gannet 



fishes, known by fossil remains. 



Ganodus, (gan-6'dus). [Gk. ganos, brightness; 

 odous, tooth.] A fossil fish, of which there 

 are many species in Great Oolite. 



Ganoid, (gan'oid). [Gk. ganos, brightness; 

 eidos, form.] Having bony scales, covered 

 with enamel. 



Ganoidei, (gan-oi'de-I). [Gk. ganos, bright- 

 ness; eidos, form.] A primary division of 

 fishes, including the sturgeon and many 

 extinct genera; having a partially ossified 

 skeleton, and being covered with enamelled 

 bony scales. Approximate to reptiles; now 

 rare, but many fossil. 



Ganoine,(gan'oin). [Gk. 0anos,brightness.] The 

 enamel coating of the scales of ganoid fishes. 



Ganymede, (gan'i-med). One of the satellites 

 of Jupiter. 



Ganomatite, (gan-om'a-tit)=Goose-duiig ore: 

 a mineral, chiefly oxide of iron and cobalt. 



Gapers, (ga'perz). Eurylaimidse : Eastern 

 birds, resembling the American chatterers; 

 have gay plumage, and build closed nests; 

 belonging to Muscicapidie. 



