41 



of the wind and other causes ; here we saw some most 

 instructive examples of injected granite in small veins 

 which came to the surface, filling up what had evidently 

 been fissures in the older rock ; then, upon following 

 Professor Jukes down the side of the hill towards Bray, 

 past a large quarry, we came to a considerable depression 

 running obliquely towards the sea-shore, forming an 

 immense smooth groove. Here he pointed out to us the 

 unmistakable marks of glacial action ; the sides were of 

 bare granite, polished and grooved deeply by the action 

 of the descending glacier, which had evidently moved 

 seaward down this ice-worn channel, for the Professor 

 also shewed us an excellent section of the dirt-bed which 

 it had projected over the cliffs on the shore — the section 

 being made by the railway cutting passing through it. 

 Re-ascending, we now directed our steps towards the 

 higher peak, called Observatory Hill, upon Avhich is placed 

 a monument, and skirting along its side, passed through 

 the beautiful grounds and by the magnificent castellated 

 mansion of Mr. Warner, with his kind permission.* We 

 returned to the railway station to await the train which 

 was to convey us back to Dublin. On our way we saw 

 some very interesting examples of slate in contact with 

 granite, and procured good illustrative specimens. Dr. 

 AUman found a remarkably fine specimen of the Fels- 

 pathic mineral Spodumene embedded in granite. 



This finished a day of great interest to all, and we re- 

 turned to our homes fully satisfied with the pleasures we 

 had enjoyed and the knowledge we had so agreeably 

 gained. The time occupied in the latter excursion was 

 six hours, from two to eight p.m. 



Two days afterwards, a small excursion party was 



• Let no one who has the opportunity of ascending from Kingstown to the 

 Obelisk lose it. The view is one of the grandest which can be obtained, and will 

 long be remembered. Editor. 



G 



