GLOSSARY. 



79 



is the principal member of the Red Sandstone group. See 



Table II. K, p. 392. 

 RETICULATE. A structure of cross lines, like a net, is said to be 



reticulated, from rete, a net. 

 ROCK SALT. Common culinary salt, or muriate of soda, found in 



vast solid masses or beds, in different formations, extensively in 



the New Red Sandstone formation, as in Cheshire, and it is 



then called rocfc-salt. 

 RUMINANTIA. Animals which ruminate or chew the cud. Etym., 



the Latin verb rumino, meaning the same thing. 



SACCHAROID, SACCHARINE. When a stone has a texture resem- 

 bling that of loaf-sugar. Etym., o-afcjcap, sacchar, sugar, and 

 ei&>e, eidos, form. 



SALIENT ANGLE. In a zig- No. 93. 



zag line, a a are the 

 salient angles, b b the 

 re-entering angles. 

 Etym., salire, to leap or bound forward. 



SALT SPRINGS. Springs of water containing a large quantity of 

 common salt. They are very abundant in Cheshire and Wor- 

 cestershire, and culinary salt is obtained from them by mere 

 evaporation. 



SANDSTONE. Any stone which is composed of an agglutination of 

 grains of sand, which may be either calcareous or siliceous. 



SAURIAN. Any animal belonging to the lizard tribe. Etym., aavpa, 

 saura, a lizard. 



SCHIST. Synonymous with slate. Etym., part of the Latin verb 

 scindo, to split, from the facility with which slaty rocks may 

 be split into thin plates. 



SCHISTOSE ROCKS. Synonymous with slaty rocks. 



SCORIJE. Volcanic cinders. The word is Latin for cinders. 



SEAMS. Thin layers which separate two strata of greater magni- 

 tude. 



SECONDARY STRATA. An extensive series of the stratified rocks which 

 compose the crust of the globe, with certain characters in com- 

 mon, which distinguish them from another series below them, 

 called primary, and from a third series above them called ter- 

 tiary. See vol. iii. p. 324, and Table II. p. 390. 



SECULAR REFRIGERATION. The periodical cooling and consolida- 

 tion of the globe, from a supposed original state of fluidity from 

 heat. Sceculum, age or period. 



SEDIMENTARY ROCKS, are those which have been formed by their 



