VI CONTENTS. 



Number 286. 



Page. 



Art. XXXVII. — An Auriferous Conglomerate of Jurassic 



Age from the Sierra Nevada ; by W. Lindgrex .- 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. 2fl0 



XLI. — Detection and Approximative Estimation of Minute 

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

 H. P. Moselet 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 Manga- 



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 ot High Temperature 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 Cliemie, W. Osm ald, 

 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, 

 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 Ferdinant> 

 von Helmholtz. 354. 



