﻿VI CONTENTS. 



NUMBER CXC. 



Page. 



Art. XXVIII. — A dissected volcanic Mountain ; some of its 



revelations ; by J. D. Dana 247 



XXIX. — Origin of the Ferruginous Schists and Iron Ores 



of the Lake Superior region ; by R. D. Irving 255 



XXX. — Further Notes on the Artificial Lead Silicate from 



Bonne Terre, Mo. ; by H. A. Wheeler 272 



XXXI. — Limonite Pseudomorphs after Pyrite ; by J. G. 



Meem 274 



XXXII. — Note on the hydro-electric effect of Temper, in 



case of Steel ; by C. Barus and V. Strouhal 276 



XXXIII. — Crystalline Structure of Iron Meteorites ; by O. 



W. Huntington 284 



XXX1Y.— New Meteoric Iron from Texas; by W. E. 



Hidden _ 304 



XXXV. — Pseudomorphs of Garnet from Lake Superior and 



Salida, Col. ; by S. L. Penfield and F. L. Sperry 307 



XXXVI. — Further notes on the Meteoric Iron from Glorieta 



Mt., New Mexico ; by G. F. Kunz. (With Plates V to 



VII)* .._ 311 



XXXVII. — Brookite from Magnet Cove, Arkansas ; by E. 



S.Dana. (With Plates VIII and IX) __._ 314 



SCIENTIFIC INTELLIGENCE. 



Chemistry. — Contributions from the Chemical Laboratory of Harvard College, 

 Cooke, 317. 



Geology and Natural History. — Brief Notices of papers read before the Geological 

 Section of the American Association, W. M. Davis, 319. — Brachiopoda and 

 Lamellibranchiata of the Raritan Clays and Greensand Marls of New Jersey, 

 R. P. Whitbield, 324. — Recently proposed genus Billingsia, S. W. Ford : 

 Catalogue of Minerals, alphabetically arranged, with their Chemical Composition 

 and Synonyms, A. H. Chester : Hooker's Flora of British India, 325 ; Notice 

 Biographique sur Alphonse Lavallee, H. L. de Vilmorin, 326. 



Miscellaneous Scientific Intelligence. — Astronomical Journal : Moon's Surface, J. 

 Ericsson: American Association for the Advancement of Science, 326. — Van 

 Nostrand's Science Series, 332. 



* Plate VII was inserted in the September number. 



