CONTENTS 



Page. 



Art. XLIII. — Topographic Development of the Triassic 



Formation of the Connecticut Valley ; by W. M. Davis 423 

 XLIV. — Analyses of three Descloizites from new Localities ; 



by W. F. HlLLEBRAND 434 



XLV. — New Meteorite from Mexico ; by J. E. Whitfield . 439 

 XL VI. — Contributions to the Petrography of the Sandwich 



Islands ; by E. S. Dana. With" Plate XIV 441 



XLVII. — Determination of Water and Carbonic Acid in 



Natural and Artificial Salts ; by T. M. Chatard 468 



XLVIII. — Preliminary Note on the Absorption Spectra of 



Mixed Liquids ; by A. E. Bostwick 471 



XLIX. — Notes on Metallic Spectra; by C. C. Hutchins 474 



L. — Allotropic Forms of Silver ; by M. Carey Lea 476 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — Composition of Water, Rayleigh, 492. — Diamide 

 hydrate and other salts, Cu rtius and Jay : Synthesis of the Glucoses and of 

 Mannite, E. Fischer and Tafel. 493. — Geometrical Isomerism, Wislicexus 

 and Holz, 494. — Aluminum acetyl-acetonate, Combes: Correction of Regnault's 

 results upon the weight of gases, J. M. Crafts: Iron spectrum, H. Kayser 

 and C. Runge : Electrical currents arising from deformation, F. Bra UN : Elec- 

 trical dilatation of quartz, J. and P. Curie, 495. 



Geology and Natural History. — Triassic Plants of Eastern North America, 496. — 

 Geological and Natural History Survey of Minnesota for the year 1881, 49?. — 

 Bommeloen og Karmoen med omgivelser geologisk beskrevne, H. Reusch, 498. 

 — Composition of a brick from the brick -yard of S P. Crafts, at Quinnipiac, 

 three miles north of New Haven, Ct , 0. H. Drake : International Congress of 

 Geologists : Brief notices of some recently described minerals, 499. — Mazapilite, 

 Koenig: Gahnite, Columbite, Genth: Stibuite from Canada, G. C. Hoffmann: 

 Mineralogy of Pennsylvania, J. Eyerman : Sinter-forming Algse : Results 

 obtained by etching a sphere of quartz and crystals of quartz with hydrofluoric 

 acid, 0. Meyer and S. L. Penfield, 501. — Seventh Annual Report of the 

 Directors of the United States Geological Survey, J. W. Powell : Journal of 

 Morphology: Development of Manicina areolata, H V. Wilson, 502. — Anatomy 

 of Astrangia Danse, 503. 



Miscellaneous Scientific Intelligence. — International Congress of Electricians : Geo- 

 logical Society of France: Botanical Society of France: American Geological 

 Society, 503. — J. A. Berly's Universal Electrical Directory and Advertiser : 

 Stellar Evolution and its relations to Geologic Time, J. Croll : Graphics, or the 

 art of Calculation by drawing lines, applied especially to Mechanical Engineer- 

 ing, with Atlas of Diagrams, R. H. Smith, 504. 



Obituary. — Frederick A. P. Barnard, 504. 



Index to Volume XXXVII, 505. 



