CONTENTS. 



Page. 



Art. XXXVI.— On the Relative Motion of the Earth and 

 the Luminif erous Ether ; by A. A. Michelson and E. 

 W. Mokley 333 



XXXVII. — On the Existence of Carbon in the Sun ; by J. 



Trowbridge and C. C. Hutchins 345 



XXXVIII. — History of the Changes in the Mt. Loa Craters ; 

 by J. D. Dana. (With Plates II, III, IV.) Part I, 

 Kilauea 349 



XXXIX.— Is there a Huronian Group? by D. R. Irving. .. 365 



XL. — Rounded Bowlders at high altitudes along some Appa- 

 lachian Rivers ; by I. C. White .-. 374 



XLI. — Description of an Iron Meteorite from St. Croix 



County, Wisconsin; by D. Fisher. With Plate V 381 



XLII. — Combinations of Silver Chloride with other Metallic 



Chlorides ; by M. C. Lea 384 



XLIII. — The Rockwood Meteorite; by J. E. Whitfield.. . 387 



XLIV. — Triclinic Feldspars with twinning striations on the 



brachypinacoid ; by S. L. Penfield and F. L. Sperrt.. 390 



XLV. — Appendix — American Jurassic Dinosaurs. Part IX. 

 The Skull and Dermal Armor of Stegosaurus ; by O. C. 

 Marsh. (With Plates VI to IX.) 413 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — Production of Ozone from Pure Oxygen, Shenstone and 

 Cunkall, 394. — Density of Nitrogen dioxide and of Nitrogen tetroxide, Dac- 

 COMO and Victor Meter, 395. — Behavior of Phosphorus, Arsenic and Antimony 

 at white heat, Mensching and Victor Meyer: Portable Apparatus for the 

 rapid estimation of Carbon dioxide in air, Pettersen and Palmqtjtst, 396. — 

 Atomic Weight of Silicon, Thorpe and Young : On the Atomic Weight of Gold, 

 Thorpe and Laurie, 391. — Occurrence of Alkaloid-like Bases in Parraffin Oil, 

 Weller, 398. — Photography applied to the flight of Birds, Marey: Spec- 

 tra of Hydrogen, Oxygen and Water Vapor, Grunwald : Earth Currents, M. 

 Landerer : Electrical standards, 399. — Absolute wave-lengths, L. Bell : 

 Annalen der Physik und Chemie, 400. — Pritchard's Wedge Photometer: Bene- 

 ficial effects of Light, G. G. Stokes, 401. 



Geology and Mineralogy. — The Terminal Moraines of the Great Glaciers of Eng- 

 land, H. Carvill Lewis, 402. — Les Eaux Souterraines a 1' epoque actuelle, etc., 

 A. Daubree, 403. — The Connecticut Lake of the Champlain period, north of 

 Holyoke, B. K. Emerson, 404. — Geological work of Marmots, Mushketoff: 

 Slide at Lake Zug of July, 1887: Organic origin of Chert, G. J. Hlnde: A 

 sketch of Geological History, E. Hull, 405. — The so-called Harlem Indicolite, 

 R. B. Riggs: Notes on some Mineral localities in Litchfield, Conn., M. R. 

 Gaines, 406.— Analysis of Blue Clay from Farmington, Maine, F. 0. Robinson, 

 401. — Magnetite crystals pseudomorph after pyrite, G. C. Hoffmann : Anwend- 

 ung der Linearprojection zum Berechnen des Krystalle, M. Websky, 408. 



Botany and Zoology. — Annals of Botany, Vol. 1, No. 1, 409. — Dermatitis venenata, 

 J. C. White: Lectures on the Physiology of Plants, J. von Sachs, 410. — 

 Comparative Morphology and Biology of the Fungi, Mycetozoa and Bacteria, 

 A. DeBary: Journal of Morphology, C. O. Whitman, 411. — Bibliotheca 

 Zoologica, O. Taschenberg, 412. 



Miscellaneous Scientific Intelligence. — Nystrom's Pocket Book of Mechanics and 

 Engineering, W. D. Marks : Sixth Annual Report of the U. S. Geological Sur- 

 vey, J. W. Powell, 412. 



