608 Notices of Memoirs— W. A. Traill on the " Glen Rock" 



of this mass, which weighed originally from 200 to 300 lbs., are to 

 be met with in most collections ; its cosmical origin, however, has 

 been regarded as doubtful, especially since Stromeyer reported that 

 he had discovered the presence of carbon in the metal. It has re- 

 cently been submitted by Haushofer to a fresh examination with the 

 aid of the more delicate analytical methods of the present day, and 

 he finds that the mass is unquestionably meteoric. When etched it 

 gives very distinct Widmannstattian figures. One part of the metal 

 he found to contain 95*2 per cent, of iron, while the composition of 

 another fragment was : 



Iron = 91-1; Nickel = 7 - 7 ; Cobalt = 0-2; Phosphorus = 0-3; Carbon, trace. 

 Total = 99-3. 



He states the specific gravity of the iron to be 7*596, a number very 

 slightly in excess of that given by Chladni. Haushofer finds, as 

 Chladni long since remarked, that the malleable character of the 

 metal varies considerably in different parts of the mass. 



With this I conclude the Second Part of the task which I have set 

 myself, that of preparing a critical digest of the results, published 

 during the last seven years, which deal with questions relating to 

 our knowledge of meteorites. In Part II. the readers of this 

 Magazine have in a manner a supplement to Part I., concluded on 

 page 264, and are placed en rapport with all that has appeared during 

 those years on the subject of meteorites which have fallen from the 

 earliest times down to the present moment. The remaining matter 

 now in course of preparation, which treats of questions of great 

 importance, although less directly appealing to the readers of the 

 Geological Magazine, will, together with considerable additions to 

 what has already appeared, be incorporated in a little work now 

 passing through the press. I cannot take my leave of the readers of 

 the Geological Magazine without begging my friend and colleague, 

 the Editor, to permit me in these columns to express my very hearty 

 thanks for the generous manner in which, throughout the entire 

 year, he has so liberally granted me space for this " Chapter in the 

 History of Meteorites." W. P. 



zestoticies o^ 1 nycEiynoiies. 



On a Mass of Travertine or Calcareous Tuff called the 

 Glen Rock, near Ballycastle, Co. Mayo, Ireland. By Wm. 

 A. Traill, M.A.I. (Master in Engineering), F.R.G.S.L, H.M. 

 Geological Survey of Ireland. 1 



THE author, after briefly describing the district, which consisted 

 of Carboniferous sandstones, shales, and limestones, inclined at 

 low angles E. N. E., referred to the occurrence of stalactitic forma- 

 tions and deposits of carbonate of lime in various places; but espe- 

 cially drew attention to the Glen Rock, distant about two miles from 

 Ballycastle ; on the eastern flanks of the valley of the Ballinglen 

 1 Read before the British Association, Bristol, 1875, in Section C. Geology. 



