36 Dr. Berger 07i the IsU of Man. 



I shall speak first of the Compound Rocks, and secondly of some 

 Simple Minerals, as they occur loose or in /////, mentioning besides 

 in each division under a particular head the primitive rocks, and those 

 that belong either to the class of Transition, or to that of the 

 Flcetz-Rocks. 



I. Compound Rocks in Situ. 



{a) Primitive Rocks, 



j" Gratiite, 



Very little of the oldest member of the primitive class of Rocks 

 is to be seen in the Isle of Man in Situ, nor is it the genuine old 

 granite. Some doubts therefore may be entertained whether in the 

 places w^here it occurs it does not lie in beds, rather than forming 

 the universal foundation of the Isle. 



Along the slope of Dun How, on the road from Laxey to 

 Ramsay, and in the middle feeder of a stream that runs into the 

 sea, occurs a small grained granite much decomposed, the quartz 

 bearing but a very small proportion to that of the felspar : when 

 breathed upon, the rock emits a strong argillaceous smell. 



The same small granite, but in a sound state, is to be seen at 

 Dun-bridge. 



The spot where it comes to the surface may be three or four 

 hundred feet above the level of the sea, but I have made no 

 observation that enables me to determine accurately. 



Another small grained granite was found in the working of a 

 lead mine at Foxdale, a place situated nearly in the middle of the 

 island, and 346 feet high. 



If the information I received from an old English miner who 



