30 Prof. H. A. Nicholson — On some Neiv Devonian Corals. 



quantities as well as that of the gas occluded in the Lenarto iron and 

 that of manufactured iron : 







Virginia Iron. 





Lenarto 

 Iron. 



85-68 

 4-46 



9-86 



Shoeing 



Hydrogen 



Carbonic oxide 



Carbonic acid 



Nitrogen 



I. 



22-12 



15-99 



7-85 



6-06 



II. 



10-52 



11-12 



1-02 



1-45 



III. 



3-19 



11-22 



0-83 

 8-58 



Total. 

 35-83 

 38-33 

 9-75 

 16-09 



35-0 

 50-3 



7-7 

 7-0 





52-02 



24-11 



23-87 



100-00 



100-00 



100-0 



These results unfortunately do not admit of very exact comparison, 

 as only a portion of the gas extracted from the Lenarto iron was 

 quantitatively examined. Although the relative quantity of hydrogen 

 in the Augusta iron is much less than in the Lenarto iron, it amounts 

 to 1-4 times the volume of the iron, while manufactured iron under 

 ordinary pressure takes up only 0-42 to 0-46 of its volume of this 

 gas. Mallet's results have shown that Graham's view, that the pre- 

 dominance of carbonic oxide among the occluded gases is indicative 

 of telluric origin, is no longer tenable. In connexion with these 

 differences in composition of the gases constituents of meteorites, it is 

 interesting to notice that the observations of Secchi and Huggins have 

 shown that carbon plays an important part in certain cosmical 

 regions, although the spectroscopic evidence in the case of this 

 element is as yet less definite than it is in regard to hydrogen. 



1869 (and 1871). Trenton, Washington Co., Wisconsin. 1 

 An additional fragment of this meteorite, weighing 16^ lbs., was 

 found in 1869; and another, weighing 35 lbs., was dug up in 1871. 

 All the six fragments (143 lbs.) now collected were found in the 

 same field. 



(To be continued in our next Number.) 



III. — Descriptions of New Species of Ctstipittllum from the 

 Devonian Rocks of North America. 



By H. Alletne Nicholson, M.D., D.Sc, F.E.S.E., 



Professor of Biology in the College of Physical Science, Newcastle-on-Tyne. 2 



(PLATE I.) 



NO less than seven species of Cystiphyllum have already been 

 recorded as occurring in the Devonian Rocks of North America ; 

 viz. C. vesiculosum, Goldf., C. Senecaense, Billings, C. grande, 

 Billings, C. sulcatum, Billings, C. Americanum, Edw. and Haime, C. 

 aggregatum, Billings, and C. mundulum, Hall. To these I have now to 

 add the following four species, all of which have been obtained by 

 me from the Devonian Formation of Canada and Ohio. 



1 J. L. Smith. Mineralogy and Chemistry, 348. — J. A. Lapham. Am. Jour. Sc., 

 [3] iii. 69. 



2 Head before the British Association, Section C, Belfast, 1874. 



