viii CONTENTS. 



NUMBER CLXXXVI. 



Page 



Art. XXXIX.— The Biela Meteors of November 27th, 1885; 



by H. A. N ewton 409 



XL. — The Ultra-violet Spectrum of Cadmium ; by L. Bell. 426 

 XLI. — Occurrence of Topaz and Garnet in Lithophyses of 



Rhyolite; by W. Cross 432 



XLII. — Strain-effect of Sudden Cooling exhibited by Glass 



and Steel ; by C. Bartjs and V. Strouhal 439 



XLIII. — Origin of the Mica-Schists and Black Mica-Slates of 



the Penokee-Gogebic Iron-Bearing Series; by C. R. V^n 



Hise. (With Plate X.) 453 



XLIV. — Two masses of Meteoric Iron, of unusual interest; 



by W. E. Hidden ,.... 460 



XLV. — New Genus of Lower Silurian Brachiopoda ; by S. 



W. Ford . 466 



SCIENTIFIC INTELLIGENCE. 



Physics and Chemistry. — Law of Gaseous Flow, Hirst, 468. — Existence of Nitryl 

 Chloride, Williams, 469. — New Oxide of Zirconium, and on its use in the 

 determination of this element, Bailey : Determination of Vanadium by means 

 of Oxycellulose, "Witz and Osmond, 470. — Physical Properties of the Marsh-gas 

 series of Hydrocarbons, Bartoli and Stracciati : Synthesis of Conine, Laden- 

 burg, 471. — Chemical Action of Bacterium aceti, Brown, 472. 



Geology and Mineralogy. — Occurrence of Olenellus (?) Kjerulfi in America, F. G. 

 Matthew, 472. — Geological formations underlying Washington and vicinity, 

 S. Townsend, 473. — Theories of Ore-deposits, M. E. Wadsworth, 474. — Slaty 

 cleavage and allied rock structures, A. Harker : Index der Krystallformen der 

 Minerahen von Dr. V. Goldschmidt, 475. — Catalogue of Meteorites: Some 

 recently described minerals, 476. — Various forms in which Gold occurs in 

 nature, W. P. Blake, 477. 



Botany. — Handbook of Plant Dissection, T. C. Arthur, C. N. Barnes and J. M. 

 Coulter, 477. — Japanese Botany, Maximo wicz: American Desmidieas, G. 

 Lagerheim, 478. — Notarisia, G. B. de Toni and D. Levi: Phycologia Mediter- 

 ranea, F. Armssone, 479. 



Astronomy. — Traite de la determination des orbites des cometes et des planetes, 

 par C. d'Oppolzer: Publications of the Washburn Observatory of the Univer- 

 sity of Wisconsin, 480. 



Miscellaneous Scientific Intelligence. — Elisha Mitchell Scientific Society, 480. — 

 International Geological Congress : National Academy of Sciences : Library of 

 the late Professor Guyot: Note to S. W. Ford's article, 481. 



Obituary. — Charles Upham Shepard, 482. 



Index to Volume XXXI, 484. 



