GRASSES 



151 



GREY 



Grasshopper 



fabric made in China from the fibre of 



Musa textilis, or of Corchorus capsularis. 



G. kopper = Gryllus : 



an insect, belonging to 



Orthoptera, with long ,-: 



hind legs. G. lizard= ; 



Tachysauru s Japonicus : 



a slender, brilliantly 



green reptile, common 



in Borneo. G. moth= 



Crambus: a small moth living in grass. G. 



tree=Xanthorrhaea. G. wrack = Zostera : a 



plant belonging to Naiadaceae. 



Grasses, (gras'es). [Grass, 2.v.]=Graminacesc, 

 q.v. 



Grasshoppers =Gryllidae, q.v. 



Gratings. Diffraction G. v. Diffraction: 



Graucalus. (graw'ka-lus)=Papuan crow; a 

 sparrow- like bird. 



Grauwacke, ( grau-wak'a ). [The German 

 word.] 1. A rock in which fragments of 

 quartz are mixed with clay-slate. 2. Used 

 to include Silurian and Cambrian rocks : 

 often used generally as = Transition rocks. 



Gravel, ( grav'el ), [ Gravelle, the French 

 word.] Water-worn fragments of rock: vary 

 in size from that of a pea to that of an 

 egg. 



Gravesande, (gra-va-san'da). [Heir Grave- 

 sande of Holland.] Gr.'s apparatus: a com- 

 bination of cords and weights intended to 

 illustrate the parallelogram of forces. G.'s 

 ring: a ring and a ball which when cold 

 passes through, but when heated will not; 

 intended to show the expansion caused by 

 heat. 



Grave-wax, ( grav'waks ). [First found in 

 graves.]=Adipocire, q.v. 



Gravitation, (grav-i-ta'shun). [L. yravis, 

 heavy.]=Universal attraction: the property 

 of all bodies to attract each other, existing 

 in every particle of matter; the force by 

 which all smaller and adjacent bodies are 

 drawn towards the centre of the earth, and 

 by which the planets are kept in their orbits 

 in the solar system. 



Gravity, (grav'i-ti). [L. grams, heavy .]= 

 Weight. Centre of G.: the point in any 

 body round which its weight is symmetri- 

 cally distributed. Specific G.: the ratio of 

 the weight of any given solid or liquid sub- 

 stance to the weight of an equal volume of 

 water; or of a given gas to that of an equal 

 volume of air or hydrogen. G. battery: a 

 galvanic battery in which the two liquids, 

 such as sulphate of zinc and sulphate of 

 copper, remain separate in the same vessel, 

 because of the difference of specific gravities, 

 so that no porous vessel is needed. 

 Gray, (gra, ). [Grag, the A.-S. word.] A 

 compound colour; a mixture of white and 

 black. G. lag : a duck, probably the species 

 from which ail other^ducks have descended. 

 G. icacke = Grau- 

 wacke, q.v. 

 Grayling, (gra'ling). 

 = Thymallus vul- 

 garis: a salmon-like 

 fish. Grayling. 



Great, (grat). [The A.-S. word.] G. circle 

 sailing =Tangent sailing, v. Sailing; G, 

 0oHZe=Bath stone, q.v. v. Oolite. 

 Greatest common measure. The largest num- 

 ber that will divide two or more other 

 numbers so that the quotients are always 

 whole numbers. 



Grebe, (greb). [Grebe, the French name.]= 

 Podiceps Hectori: an aquatic bird. 

 Grecian architecture. A style of architecture 

 in use in ancient Greece before the use of the 

 arch. Corinthian : the most richly orna- 

 mented order of Greek architecture. Goric: 

 an order of Greek architecture, of Egyptian 

 derivation, in which the columns have no 

 bases. Ionic: an order of Greek architec- 

 ture, of Assyrian derivation, lighter than 

 the Doric, and less decorated than the Corin- 

 thian. 



Green, (gren). [Grene, the A.-S. word] A 

 colour intermediate between yellow and 

 blue. G. 6one=Belone vulgaris: also=Zoar- 

 ces viviparus: a fish. G. blights= Aphidae: 

 insects belonging to Homoptera. G. bottle 

 =Musca chloris: a bright green fly. G. crab 

 =Carcinus moenas: a crustacean. G. finch= 

 Fringilla chloris: a bird. G. /ter=Sipeira 

 =Laurus chloroxylpn: a tree resembling the 

 locust tree, found in Guiana. G. marble 

 Serpentine, q.v. G. 7no?ie?/:=Cercopithecus, 

 q.v., found in the Cape de Verde Isles. G. 

 pigments: derived from copper, chrome, 

 arsenic, potash, &c. G. sand: a rock, be- 

 tween Wealden and Chalk, not necessarily 

 green in colour. G. s<one=Trap, q.v. : a 

 variety of trappean rocks, including com- 

 pounds of felspar, with hornblende or with 

 augite. G. vitriol= Sulphate of iron. G. 

 stars: Sirius, Vega, Atair, Deueb. Scheele's' 

 G.=CuHAsO3=Arsenate of copper, used as 

 a pigment. 



Greenockite, (gre'nok-It). A mineral, chiefly 

 sulphide of cadmium. 



Gregarinida, (gre-ga-ri'ni-da). [L. gregarius, 

 in a herd.] Parasitic microscopic animals, 

 belonging to Protozoa, one of the simplest 

 animal forms known, having no mouth, 

 found in the intestines of insects. 

 Gregorian, ( gre-go'ri-an ). G. calendar, v. 

 Year. G. scales.- the scales of A, B, C, and 

 D. v. Keys, G. telescope : a variety of the 

 reflecting telescope, in which the metallic 

 mirror is pierced by the opening for the eye, 

 invented by Professor Gregory. 

 Grenade, (gre-nad'). [Grenade, th.o French 

 word.] A small bomb- 

 shell, v. Shell. 

 Grenadilla, ( gren-a-dil'- 

 la). The fruit of Passi- 

 flora quadrangularis: a 

 large West Indian fruit. 

 Grewia, (grew'i-a). [Dr. 

 Gre w. ] A plant belong- 

 ing to Tiliacese. 

 Grey, (gra). [Gray, ?.v.] 

 =Gray, q.v. G. lag= Grenade. 



Anser ferus: a duck from which all species 

 of ducks have descended. G. mullet=M.ugil 

 capito. G. antimony A. native sulphide of 



