ELIE DE BEAUMONTS SYSTEMS. 



cation of its crust this part of the globe has undergone at least 

 seventeen distinct convulsions, each of which has produced a 

 mountain system, the mean direction of which has been ascer- 

 tained, and is characteristic of it. These seventeen systems have 

 received denominations, as already mentioned, from some locali- 

 ties in which their prevalence is most conspicuous, and the 

 directions which characterise them are indicated in the following 

 diagram. 



Fig. 116. Directions of the principal Mountain-systems. 



201. The order in which these several systems have been 

 elevated is indicated by the numbers placed at one extremity of 

 the lines indicating their direction, and these directions are 

 expressed with more numerical precision in the following table, 

 where W. 21 S. means a point 21 south of west; N. 23 E., a 

 point 23 east of north ; W. 38 N., a point 38 north of west, 

 and so on. The places indicated in the second column are 

 those from which the system takes its name, and those indi- 



