260 GLOSSARY. 



Subterranean, underground, below the earth's surface. 



Submerge, to plunge under water, to overflow. 



Strata, layers of rock. 



Spherule, a little sphere, or ball. 



Simoon, a hot suffocating wind, that blows occasionally in Af- 

 rica and South America. 



Sirocco, a pernicious wind that blows from the south-east in 

 Italy. 



Salubrious, healthful, favorable to health. 



Supernatur al, miraculous, out of the usual course of nature. 



Solar spectrum, the seven primary colors as seen in the rain- 

 bow. 



Stratified, arranged in strata or layers. 



Silurian, a series of rocks forming the upper subdivision of 

 the sedimentary strata found below the old red sandstone, 

 and formerly designated the graywacke series. 



Scape, a stalk which springs from the root, and supports 

 flowers and fruit, but no leaves. 



Saturate, to fill with a fluid, absorb, soak. 



Sedimentary rocks, are those which have been formed by 

 their materials having been thrown down from a state of 

 suspension or solution in water. 



Syenite, a kind of granite so called because it was formerly 

 brought from Syene in Egypt. 



Serpentine, a rock usually unstratified, containing much mag- 

 nesia, and often speckled of various colors, like a serpent's 

 back. 



Sculpture, the art of carving wood or stone into the images of 

 men or animals. 



Stucco, a fine white plaster, to plaster with stucco. 



Stalactite, a variety of carbonate of lime in the form of icicles, 

 produced by the filtration of water containing lime in solu- 

 tion, from the crevices of rocks in the roofs of caverns. 



Stalagmites, are similar to stalactites, but formed by the drop- 



