GLOSSARY. 249 



Generate, to produce or create. 



Gelatine, a proximate principle in plants and the bodies of ani- 

 mals, usually called jelly. 



Guano, a species of manure composed mostly of the excre- 

 ments of sea fowl. 



Granite, an unstratified primary rock. 



Greenstone, a variety of trap rock composed of hornblende 

 and feldspar. 



Gneiss, a primary stratified rock composed of the same mate- 

 rials as granite. 



Garnet, a simple crystalized mineral, generally of a deep red 

 color. 



Gypsum, plaster of paris, sulphate of lime. 



Graphic granite, is a species of granite in which the quartz is 

 so arranged as to give the surface the appearance of having 

 letters. 



Gorge, a deep fissure or valley. 



Gyration, turning in a circular or spiral direction. 



Glossology, the application of names to the various organs of 

 plants. 



Granulated, consisting of small grains, granules, or masses. 



Genus, the subdivision of an order. 



Gland, an organ in animals and vegetables which performs the 

 function of secreting a fluid. 



Germination, the unfolding of the seed and development of 

 the embryo. 



Geine, a substance obtained from decayed wood, and contain- 

 ing an acid called the geic acid. 



Glanular, consisting of grains. 



Grayivacke, an ancient fossiliferous rock, generally of a gray 

 color. 



Gravity, weight : specific gravity, the weight of a particular 

 body compared with some standard. 



Gas, an elastic fluid, or air. 



