﻿CONTENTS. 



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 R 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, TT. M. Davis, 319. — Brachiopoda and 

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

 R. P. Whitiield, 324. — Recently proposed genus Billingsia, S. Yf. Ford: 

 Catalogue of Minerals, alphabetically arranged, with their Chemical Composition 

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

 Biogfaphique sur Alphonse Lavallee, H. L. de Yilmorin, 326. 



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

 Ericssox: American Association for the Advancement of Science, 326. — Yan 

 Nostrand's Science Series, 332. 



* Plate YII was inserted in the September number. 



