CHAMBERS'S INFORMATION FOR THE PEOPLE. 



Ganglia, in Zoology, 139 ; in Physiology, 123. 



Ganoidei (Gr. ganos, splendour, from the bright 

 surface of their enamel), one of the four great 

 orders into which M. Agassiz has arranged the 

 class Fishes. The Ganoids are entirely covered 

 with angular scales, regularly arranged, com- 

 posed internally of bone, and coated with 

 enamel. Nearly all the species are extinct ; 

 the sturgeons, and bony -pike of the North 

 American lakes, are living examples, 160, 



Gardens, Kitchen, Flower, and Fruit, 545-592. 



Garlic, nature and culture of, 554. 



Garnet, varieties of, 400. 



Garters, 795. 



Gases, elasticity of, 237. 



Gas-illumination, history and practice of, 493-496. 



Gas-meter, gas-holder, 495 ; gas-burners, 496. 



Gasteropoda (Gr. gaster, belly, pous, foot), a well- 

 known class of mollusks, 152. 



Gastric juice, 115, 723. 



Gault or gelt, a local term applied to certain marly 

 clays of the cretaceous system, 30. 



Gavial, a species of crocodile found in India, 166. 



Gazelle (Antelopzdce), in Zoology, 183. 



Gelatine, a jelly or soft substance, obtained by 

 boiling either the soft parts or bones of animal 

 bodies, 743. 



Gemmae, gemmules, in Zoology, 133, 135. 



Gems, artificial, manufacture of, 365. 



Generation, function of, 130 ; spontaneous or 

 equivocal, in Zoology, 134 ; duration of, in 

 Chronology, 294. 



Genus, in Zoology, 131. 



Geographical terms, explanations of, 51. 



GEOGRAPHY, PHYSICAL, 49-64. 



Geological periods Palaeozoic, Neozoic, Cainozoic, 

 24. 



GEOLOGY as a science, 17-32. 



Geraniaceae, order in Botany, 93. 



German silver, composition of, 415. 



Gibbons, apes, 191. 



Gibbous, in Astronomy, 1 1. 



Gilding and plating, 276. 



Gimbals (Lat. gemellus, a pair), a piece of 

 mechanism, consisting of two brass hoops or 

 rings, which move within one another, about 

 two axes, placed at right angles to each other. 

 A body suspended in this manner, having a 

 free motion in two directions at right angles, 

 will assume the vertical position ; hence gimbals 

 are employed for the suspension of sea-com- 

 passes, &c. 460. 



Gimmer (sheep), 647. 



Gin, in Dietetics, 752. 



Ginger-beer, 751. 



Giraffe, or Camelopard, order Ruminantia, 182. 



Glaciers, vast fields of ice or concrete snow, which 

 are formed in the hollows between lofty moun- 

 tains, and abound in the Swiss and Tyrolese 

 Alps, 22. 



Gladiolus, in Gardening, 566. 



Gland, a name given to all those organs of the 

 body, large or small, which separate a secretion 

 from the blood, and have ducts to excrete it, in 

 Vegetable Physiology, 71 ; in Human Physi- 

 ology, 114, 117. 



Glass, various sorts, the composition and manu- 

 facture of ; cutting, grinding, etching ; staining, 

 colouring, and enamelling, 360-365. 



Glazes and enamels, in Fictile Manufactures, 355. 



Globigerina, in Zoology, 133. 

 810 



Glonoin-oil, or nitro-glycerine, 352. 



Glottis, 1 20, 772. 



Gloves, origin and introduction of, 791. 



Glow-worm (Lampyris noctiluca), 150. 



Glucinium or beryllium, the metallic base of the 



earth glucina, 315. 

 Glumiferas, one of the Jussieuian subdivisions, 



no. 

 Gluten, an elastic and tenacious substance, found 



largely in flour and other vegetable bodies, in 



Vegetable Physiology, 65 ; in Dietetics, 738. 

 Glycerides enumerated, 335. 

 Glycerine, its uses in Applied Chemistry, 334. 

 Glycogenic function, in Human Physiology, 122. 

 Gnat, family Culicidae, in Zoology, 147. 

 Gneiss, a crystalline rock, 23. 

 Gnomon, the erect style or pin of a dial, 294. 

 Gnu, family Antelopidae, in Zoology, figured, 183. 

 Goat, in Zoology, 183 ; as a domesticated animal, 



655. 



Goat-suckers (Caprimulgida), 175. 

 Goby tribe, Gobiodse, in Zoology, 1 59. 

 Goitre and Cretinism, 500. 

 Gold, in Chemistry, 330 ; in Metallurgy, 401 ; 



average yield of, 401 ; alloys, 403. 

 Goldfinches and bullfinches, as cage-birds, 671. 

 Gold-fish of China. 1 56. 

 Goose, in Zoology, 169 ; domesticated, 669. 

 Gooseberry, in Botany, 98 ; in Gardening, 586. 

 Gorilla (Troglodytes), 192. 

 Gothic architecture, 472. 

 Gourds (Cucurbitacea)) one of the Jussieuian 



orders, 97. 



Gout, treatment of, 779. 

 Governor, the, in mechanics, figured, 427. 

 Gowns, origin and introduction of, in Costume, 



790. 

 Gradient, a word now used to denote the deviation 



of railways from a level, 443. 

 Grafting, in Horticulture, its theory and practice, 



564, 577- 

 Grallatores, or Wading-birds, order in Zoology, 



169. 



Graminaceas, the Grasses or Grass tribe, 1 10. 

 Granite, economically considered, 395 ; its com- 

 position and geological relations, 18. 

 Grapes, varieties of, in Horticulture, 588. 

 Graphite (Gr. grapho, I write), a mineralogical 



term for plumbago or black-lead, 322 ; in Useful 



Minerals, 398. 



Graptolite (Gr. grapho and lithos), 25. 

 Grasses, in Agriculture, 525. 

 Grasshoppers, in Zoology, 146. 

 Grates, 483 ; Arnott's smokeless grate, 483 ; 



register grates, 486. 

 Gravity, specific, defined, 195 ; terrestrial, 200 ; 



centre of gravity, 201. 

 Grebes (Podiceps), in Zoology, 168. 

 Greek architecture, 468. 

 Greenhouse, plants adapted for, 569 ; general 



management of, 569. 

 Green-sand, the lowest member of the Chalk 



System, 30. 

 Greenstone, in Geology, 18 ; in Useful Minerals, 



396. 



Gregarinidse, in Zoology, 133. 

 Gregorian, a name applied to the arrangement of 



the calendar year made by Pope Gregory, and 



familiarly called the change from the old to the 



new style, 292. 

 Greyhound, varieties of, 691. 





