SCIENTIFIC SUMMARY. 
101 
black colour, and that with a high magnifying power these lines are re- 
solved into rows of extremely minute dark granules similar to those forming 
the dust. This remarkable structure, combined with that previously given, 
is so thoroughly characteristic of nosean that there can be no doubt of its 
presence in the rock ; the mineralogical composition of which is thus found 
to be in complete accordance with that of the large series examined by 
Zirkel. 
The late Eruption of Mount Vesuvius. — One of the most graphic and 
exciting sketches which we have seen on this subject is that of Mr. J. M. 
Black, in the u Proceedings of the Geologists’ Association,” vol. iii. No. 6. 
He was on the spot throughout the entire outbreak, and the effect pro- 
duced on him he describes in such a marvellously forcible style, that 
we venture to say that few who will read his paper will not be equally- 
impressed by his description of those wonderful phenomena. 
The Record of Geological Literature. — We are very glad to see that it 
is intended to issue a yearly volume, which shall consist of a record of 
Works on Geology, Mineralogy, and Palaeontology, British and Foreign. 
The first volume will be printed by the middle of 1875, and will contain 
short abstracts or notices of papers, books, maps, &c., published during the 
year 1874. It is estimated that this volume will contain from 200 to 300 
pages, and that its price will be 10s. Gd. The gentlemen named below have 
volunteered to assist in the work, which has already been begun. Those 
marked * have taken charge of various sections (as Sub-editors), and the 
last has undertaken the post of general editor. Rev. T. G. Bonney, F.G.S., 
* W. Carruthers, F.R.S., F.G.S. (British Museum) ; C.E. Be Ranee, F.G.S. 
(Geological Survev) ; *R. Etheridge, junior, F.G.S. (Geological Survey of 
Scotland) ; B. Forbes, F.R.S., F.G.S. ; Br. O. Le N. Foster, F.G.S. ; Prof. 
Geikie, F.R.S., F.G.S. (Birector of the Geological Survey of Scotland); 
* Prof. A. H. Green, M.A., F.G.S.; Prof. T. R. Jones, F.R.S., F.G.S. ; A. 
J. Jukes-Browne, B.A., F.G.S. (Geological Survey) ; * G. A. Lebour, 
F.G.S. ; * L. C. Miall (Leeds Museum) ; E. T. Newton, F.G.S. (Jermyn 
Street Museum) ; * Br. H. A. Nicholson, F.G.S.; * F. W. Rudler, F.G.S. 
(Jermyn Street Museum) ; E. B. Tawney, F.G.S. (Bristol Museum) ; * W. 
Topley, F.G.S. (Geological Survey) ; Henry Woodward, F.R.S., F.G.S. 
(British Museum) ; H. B. Woodward, F.G.S. (Geological Survey) ; W. 
Whitaker, B.A., F.G.S. (Geological Survey). The work will be greatly 
helped if Provincial Societies and Field Clubs will forward copies of their 
publications to the editor. 
It is hoped, from the low price, that the number of subscribers (amount- 
ing to 140 before the issue of this circular), will be enough to cover the 
expenses of printing; but should this not be the case, the following gentle- 
men have kindly consented to act as guarantors : — Br. Bigsby, F.R.S., 
F.G.S.; E. W. Binney, Esq., F.R.S., F.G.S.; Rev. T. G. Bonney, F.G.S.; 
Dr. Bowerbank, F.R.S., F.G.S.; J. Brigg, Esq., F.G.S., and Friend; C. Bar- 
win, Esq., F.R.S., F.G.S.; T. Bavidson, Esq., F.R.S., F.G.S.; J. Eccles, 
Esq., F.G.S. ; Sir P. de M. G. Egerton, Bart., F.R.S., F.G.S.; The Earl of 
Enniskillen, F. R.S., F.G.S.; J. Evans, Esq., F.R.S. (Pres. G. S.) ; J. Faws- 
sett, Esq. ; B. Forbes, Esq., F.R.S. (Sec. G. S.) ; R. A. C. Godwin-Austen, 
Esq., F.R.S., V.P.G.S.; Capt. Marshall Hall, F.G.S.; J. Gwynn Jeffreys, 
