80 J. A. Birds — On the Isle of Man. 



Baumhauer believed to be of pyrites (FeS 3 ), but which Eose main- 

 tained were of magnetic pyrites, were in vain sought for. 



Two plates, copied from photographs of the aerolite, are appended 

 to the paper. 



It rarely happens that Widmannstattian figures are developed in 

 irons containing more than nine per cent of nickel. With a know- 

 ledge of the difficulties attending the complete separation of nickel 

 and cobalt from iron and of the different action of the re-agents, 

 employed to bring these metals into solution, on the phosphides, 

 rich in nickel, which frequently accompany them, it would not be 

 advisable to lay too great stress on the results of earlier analyses of 

 meteoric irons as pointing to any general conclusion when the details 

 of the processes made use of cannot likewise be studied. It is 

 worthy of note, however, that the irons mentioned below, with the 

 per-centage of nickel found in them, give lines occasionally, but no 

 figures : 



Octibbeha Co. = 59-69 ;-Caille = l 7*37; Babb's Mill = 17-1, 14-7, and 12-4: 

 Howard Co. (1862) = 12-29 ; Atacama (1862) =11-5 ; Krasnojarsk = 

 10-73; Tucuman = 10-0; Zacatecas = 9-89 ; and Szlamcza = 8 - 91. 

 While the following irons exhibit them in great perfection : 



Elbogen = 8-5; Lion River = 6*7; Lenarto=655 ; Modoc = 6 - 35; Sevier 

 Co. =6-5 and 5-8; Schwetz=5"77; Tabarz=5-69; Cambria = 5-7 and 

 5 - 0; Braunau = 5 5; Asheville = 5-0 ; and Ruff's Mountain = 3-12. 



(To be continued in our next Number.) 



IV. — On the Post-pliooene Formations or the Isle of Man. 

 By J. A. Birds, B.A. 



IT is not a little remarkable that, while almost every part of England 

 and Scotland, and particularly the district of " the Lakes " 

 and North Wales, has been abundantly studied and written about, — 

 and while Ireland also has been almost completely surveyed, — the 

 Isle of Man should not only have been left untouched by the 

 Geological Survey, but, latterly at least, should have well-nigh 

 escaped the attention of geologists altogether. With the exception 

 of three or four papers by the Rev. J. G. (Humming, published in 

 the Quarterly Journal of the Geological Society, and their embodi- 

 ment in a more popular form in his History of the Isle of Man, 

 and Guide Book, 1 scarcely anything appears to have been written 



1 The following is as complete a list as I have been able to glean of all works or 

 papers relating to the geology of the Isle of Man : — 



1. "An Account of the Isle of Man." By Geo. "Wood. 1811. 



2. "A Mineralogical Account of the Isle of Man" By Dr. Berger. Trans- 



actions of the Geological Society, 1st series, vol. ii. 1814. 



3. " A Supplementary Notice of the same." By Prof. Henslow. Trans, of 



the Geol. Soc. 1st series, vol. v. 



4. A Notice of the Island in Macculloch's ""Western Isles of Scotland," vol. ii. 



p. 516. 1819. 



5. "A Memoir on the Discovery of the Megacaros Hibemicus in the Isle of 



Man." By Dr. Hibbert. Edinburgh Journal of Science, No. 5. 1826. 



6. "On the Stratification of Alluvial Deposits in the Isle of Man." A Pamphlet 



by H. R. Oswald, Esq. Douglas, 1823. 



7. "On Concretions in the Pleistocene Deposits of the North of the Island." 



By Hugh Strickland, Esq., F..G.S. Proc. Geol. Soc. vol. iv. 1843. 



