Correspondence — G. H. Kinalian. 141 



MR. CROLL ON THE OSCILLATIONS OF THE SEA-LEYEL DUE TO 

 THE ADVANCE AND RETREAT OF THE ICE CAP. 



Sir, — In my recently published book on " Valleys and their Rela- 

 tions to Fissures, Fractures, and Faults," in a foot-note on page 182, 

 I refer to Mr. Croll's paper " On the Glacial Epoch " [Geol. Mag. 

 July and August, 1874], and point out that the oscillations in the 

 sea-level " will account for the very uniform altitude of the ancient 

 sea-beaches." As this note was added at the last moment, just 

 previous to the book issuing from the press, it necessarily is not so 

 explicit as it might be, and I find it has been taken exception to. 

 Will you therefore allow me, through the medium of the Geol. Mag., 

 to supplement the note ? 



Although I believe Mr. Croll's theory to be correct, and that the 

 sea in general rose and fell while the land for the most part re- 

 mained comparatively stationary, yet I do not for a moment imagine 

 that there were no oscillations of the land. On the contrary, such 

 movements are proved in Ireland, as I have shown in different papers 

 on its geology. Take, for instance, the margin and gravels of the 

 " Esker Sea," which in some districts are at higher altitudes than in 

 others. There are also the post-Drift faults, some being more 

 recent than our newest Drift, which could not possibly have been 

 formed without greater or less changes in the level of the land. 

 Such changes in the level of the land clo not seem to be denied by 

 Mr. Croll, neither to me do they appear to affect his theory ; as they, 

 with a few exceptions, are mere bagatelles compared with the 

 universal oscillations in the sea-level. 



G. H. KlNAHAN. 



HVCISCIEXjIj-A.IIsnEOTTS- 



Phillips's Geology of Yorkshire. — Subscribers to the new edition 

 of the late Professor Phillips's " Geology of Yorkshire," Part 1, " The 

 Yorkshire Coast," will be glad to hear that it has been placed in the 

 hands of Mr. Robert Etheridge, F.R.S., F.G.S., and is now nearly com- 

 pleted ; the last proof-sheets having been revised and the new map and 

 plates nearly all coloured. It is hoped that by April the Professor's 

 earliest and latest work will be issued. 



The Busti Meteorite. — Apropos of the " Chapter in the History of 

 Meteorites " now appearing in this Magazine, Dr. Flight desires us to 

 state that, since the publication of the January Number, he has ascer- 

 tained that a preliminary note on the Calcium Sulphide of the Busti 

 aerolite, mentioned on page 16, was published in the Brit. Assoc. 

 Reports, 1862, " Notes and Abstracts," Appendix ii., page 190. — 

 Edit. Geol. Mag. 



Volcanic Eruption in Java. — " The Hague, Feb. 3, 1875. — The 

 Government has received a despatch from Batavia, of to-day's date, 

 announcing an eruption of the volcano Kloet, in the island of Java, 

 whereby great destruction has been caused at Blitar." 



