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CONTENTS. 



Page, 

 Art. XL VI. — Destruction of the Passivity of Iron in Nitric 



Acid by Magnetization; \>y E. L. Nichols and W. S. 



Franklin 419 



XLVIL — Method of making the Wave-length of Sodium 



Light the actual and practical standard of length ; by 



A. A. Michelson and E. W. Morlby 427 



NLVIIL— Work of the International Congress of Geologists; 



by G. K. Gilbert ... 430 



XLIX. — Existence of certain Elements, together with the 



discovery of Platinum, in the sun ; by C. C. Htjtchins 



and E. L. Holden 45 1 



L. — Flora of the Coast Islands of California in relation to 



recent changes of Physical Geography; by J. LeOonte. 457 

 LI. — Determination of " prevailing wind direction ;" by H. 



Allen Hazen 46 1 



LIL— New instrument for the measurement of Radiation; 



C. C. Htjtchins . 466 



LIII. — American Meteorites ; by G. F. Kunz. (With Plate 



X) • 467 



LIV. — Mineralogical Notes ; by G. F. Kunz _ 477 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — Study of Chemical reactions by means of Electrometer, 

 Bouty, 480. — Detection of minute traces of Carbon dioxide, Rossler, 481. — 

 Heat of Combination of Tellurium, Berthelot : Occurrence of Aluminum in 

 the Ashes of Flowering Plants, Yoshida: Ammonio-cobaltic permanganates, 

 Klobb, 482. — Character of Solution, Mendelejeff, 483. — Chemical Action of 

 Bacterium Aceti, Brown: Light emitted by glowing solid bodies, 484. 



Geology and Mineralogy.- — Location of some Vertebrate Fossil Beds in Honduras. 

 F. L. Nason, 485.- — Professor Ward's Synopsis of the Flora of the Laramie 

 group, 487. — Pot-hole of remarkable size in Archbald, Pa : Lake Age in Ohio, 

 or some Episodes in the Retreat of the N. A. Glacier, 489 — Carboniferous 

 Fossil Corals: Primordial Fossils from Mt. Stephens, N.-W. Territory of Canada, 

 Rominger: Teachings of Geography, Geikie : North Carolina Diamond, G. F. 

 Kunz: Herderite: Periclasite, 490. 



Botany. — Monographias Phanerogam a ruin Prodromi, Planchon, 490. — Report on 

 Botanical Work in Minnesota for 1 886 : Course of Practical Instruction in Botany : 

 Grasses of North America for Farmers and Students, W. J. Beal, 492. — Ser- 

 jania Sapindacearum Genus monographice descriptum, L. Radlkofer: Fish- 

 inebriating Plants : British Moss Flora : Pittonia, a series of Botanical papers, 

 E. L. Greene, 493. — Catalogue provisoire des Plantes Phanerogames et Oryp- 

 togames de la Basse Louisiane, A. B. Langlois: Development of the Ostrich 

 Fern, D. H. Campbell: Studi botanici sugli Agrumi e sulle piante affini, 0. 

 Penzig, 494. — Elements of Botany, A. Gray: Elements of Botany, E. S. 

 Bastin, 495. 



Miscellaneous Scientific Intelligence. — National Academy of Sciences, 496. 



Obituary — Gustav Robert Kirchhoff, Oscar Harger, 496. 



Index to Toluhe XXXIV, 497. 



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