38 Dr. Berger on the Isle of Man, 



half-decomposed slate along the mountainous road that runs from 

 Ramsay to Douglass, between Slieau-Lhearn and little Snei-feldt. 



The clay-slate of Snei-feldt has a close texture. Its basis is 

 remarkably fine, the gloss not very resplendent : it fuses into a 

 brownish enamel, and is traversed by slender veins of granular 

 and whitish quartz. 



The clay slate of Bein-y-phot has a dull black-brown colour, 

 while that of Cronk-ne-liry-Lhaa is sometimes so glossy as to 

 resemble plumbago, is soapy to the feel, fusible into a yellowish and 

 bubbly enamel, the fracture is foliated, with some minute specks of 

 white mica. 



On the slope of South Bor-roilva the clay slate assumes a more 

 flinty character, the grain is also very close. At Peel-hill, in a 

 situation still lower than on the slope of South Bor-roilva, we come 

 to another flinty clay slate, in the basis of which are distributed 

 extremely minute specks of mica ; it fuses inro an olive brown 

 enamel. The rock is quarried, but the beds that are used for 

 roofing alternate with two others of a different nature. The one 

 is a greyish compact felspar, the structure of which is rather thick 

 slaty, with a close texture, the fracture is short scaly, it contains 

 dispersed specks of mica, and fuses into a white frothy enamel. 

 The strata run nearly East and West, dipping at an angle from 75° 

 to 90°. The other bed alternating with the roof slate is called the 

 Knobby Side^ and forms the wall of the quarry itself. It has a silky 

 lustre, and the planes of the strata, which are nearly vertical, instead 

 of being even, offer little cavities smoothened and adapted for the 

 reception of prominent parts similar in dimensions that exist on 

 the contiguous bed. There is another roof slate at Balla-Gawn 

 of a dark grey colour, rising by flags and of a fissile texture. 



The clay slate of Mount Pellier has a structure rather thin slaty, 



