CONTENTS. 



Page 



Art. XXXYII. — Au Auriferous Conglomerate of Jurassic 



Age from the Sierra Nevada; by W. Lindgren. 275 



XXXVIII.— Antholite from Elzivir, Ontario; by A. P. 

 •Coleman 281 



XXXIX. — Double Chlorides and Bromides of Caesium, Ru- 

 bidium, Potassium and Ammonium with Ferric Iron, 

 with a description of two Ferro-ferric double Bromides ; 

 by P. T. Walden 283 



XL. — The Standardization of Potassium permanganate in 



Iron Analysis; by Charlotte F. Roberts 290 



XLI. — Detection and Approximative Estimation of Minute 

 Quantities of Arsenic in Copper; by F. A. Gooch and 



H. P. MOSELEY ■_ 292 



XLI1. — Notes on the Miocene and Pliocene of Gay Head, 

 Martha's Vineyard, Mass., and on the " Land phosphate " 

 of the Ashley River district, S. C; by W. H. Dall.... 296 



XLI1I. — Thermo-electric Properties of Platinoid and Mauga- 



nine; by B. O. Peirce,. 302 



XLIV. — Change of Period of Electrical Waves on Iron- 

 Wires ; by J. Trowbridge 307 



XLV. — Wave lengths of Electricity on Iron Wires; by C. 



E. St. John. : With Plate IX. •*.. 311 



XL VI. — Age of the Manganese beds of the Batesville Region 



of Arkansas; by H. S. Williams 325 



XLVII. — Present Status of High TemDerature Research ; by 



C. Barus. With Plate X 332 



XLVIII. — Recent eruption in the Crater of Kilauea ; by L. 



A. Thurston 338 



XLIX.— Solutions of Metallic Silver; by M. C. Lea 343 



L. — Gigantic Bird from the Eocene of New Jersey ; by O. 



C. Marsh 344 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — New Gaseous Constituent of the Atmosphere, Kay- 

 leigh : Die wissenschaftliche Grundlagen der analytisehen Cbemie, W. Ostwald, 

 345. — Note on the telephonic measurement of electromotive force, C. Barus : A 

 Laboratory Manual of Physics and applied Electricity, E. L. Nichols, 346. 



Geology and Mineralogy — Geological Society of America: New Miocene Tapir, 

 0. C. Marsh, 348. — Channels on Drumlins, G. H. Barton, 349. — Trias and 

 Jura of Shasta Co , Cal, J. P. Smith: Carboniferous Strata of Shasta Co., Cal., 

 J. P. Smith : Anomalies in the growth of Alum Crystals, H. A. Miers, 350. 



Astronomy — Verzeichniss der Elemente der bisher berechneten Cometenbahnen, 

 J. G. Galls: Gesammelte "Werke von Heinrich Hertz, Band III, 352. 



Miscellaneous Scientific Intelligence — American Association for the Advance- 

 ment of Science, 352. — British Association: University of Oxford, 353. 



Obituary — Josiah Parsons Cooke, 353. — Baron Herman Ludwig Ferdinand 

 von Helmholtz, 354. 



