EXCURSION IV. 105 



with the hotel. The sandstone strata are well exposed, and 

 there are some curious dikes. The burn throughout its 

 whole course is highly picturesqiie ; indeed, none of the 

 Arran burns, lovely as most of them are, have the same 

 variety of picturesque features as those in the red sandstone. 

 The alternation of hard and soft strata, of sandstones and 

 conglomerates with variegated marls, the depth and peculiar 

 style of disintegration of the rocks, the many pretty ledgy 

 falls, the contrasts of the black basaltic veins, of the rich 

 colours of the rocks, the luxuriance of the wild wood and 

 wild flowers, bring out a variety in the effects not to be seen 

 in burns running over granite, slate, or basalt. This is 

 strikingly seen in the burns of North and South Sannox 

 glens, Glen Scorodale and Torlin, which gain greatly in 

 picturesque beauty directly on their entrance among the 

 sandstone strata. In drawing and painting them, rocks 

 ought always to be individualized ; and every artist ought 

 to be a geologist. A thorough acquaintance with the rocks 

 would be like the implanting of a new sense. 



