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CONTENTS. 



Page 



Art. I. — Quarries in the Lava Beds at Meriden, Conn.; by 



W. M. Davis __. 1 



II. — Note on Globular Lightning; by O. C. Marsh 13 



III. — Form of Isolated Submarine Peaks ; by G. W. Little- 

 hales 15 



IV. — Double Fluorides of Caesium and Zirconium ; by H. L. 



Wells and H. W. Foote._ 18 



V. — Section of the Cretaceous at El Paso, Texas; by T. W. 



Stanton and T. W. Vaughan _ _ 21 



VI. — Epidote from Huntington, Mass., and the Optical Prop- 

 erties of Epidote ; by E. H. Forbes 26 



VII. — Iodometric Determination of Selenious and Selenic 



Acids; by F. A. Gooch and A. W. Peirce... 31 



VIII. — Interaction of Chromic and Arsenious Acids ; by P. 



E. Browning __.__. __ 35 



IX. — Note on the Analysis of Contrast-Colors by viewing, 

 through a reflecting tube, a graded series of gray discs, 

 or rings, on colored surfaces; by A. M. Mater 38 



X. — Very Simple and Accurate Cathetometer ; by F. L. O. 



Wadsworth. (With Plate I.) 41 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics— Determination of Argon, Schlcesing, Jr., 49. — Graph- 

 ite in Pegmatite, Moissan: Volumetric Determination of Cyanogen, Deniges. 

 50 — Emission of Light during Crystallization, Bandrowski, 51. — Properties of 

 Titanium, Moissan: Proofs of , Chemical Laws, Cornish, 52. — Molekularge- 

 wichtsbestimmung, FuCHS: Manual of Organic Chemistry, Cohn: Organic 

 Chemistry, Whiteley, 53. — Histoire de la Philosophic Atomistique, Mabilleau: 

 Copper Smelting, Peters, Jr.: Light-emission power of bodies at high temper- 

 atures, St. John, 54. — Proof of the law of radiation, Wien and Lummer: Plas- 

 ticity of Ice, Mugge: Magnetismus der Planeten, Leyst, 56. — Molecular Theory 

 of Matter, Risteen: School Physics, Avery, 57. 



Geology and Mineralogy — Gold Fields of Appalachians, Becker, 57. — Geologi- 

 cal Survey of New Jersey, 60. — Geological Survey of New York : Mollusca and 

 Crustacea of the Miocene of New Jersey, Whitfield, 61. — Climates of the 

 Geological past, Dubois, 62. — Geological Biology, Williams: Mikroskopische 

 Physiographie der massigen Gesteine, Rosenbusch, 63. — Rubies of Burma, 

 Brown and Judd, 64. — New Minerals, 70. 



Botany— Pleiotaxy in the androscium of Epidendrum cochleatum, L.: Structure 

 and Development of the Mosses and Ferns, Campbell, 72. — Phycotheca Boreali- 

 Americana, Collins, Holden and Setchell, 73. — Introduction to the Study of 

 Seaweeds, Murray, 74. 



Miscellaneous Scientific Intelligence — Comet of 1843 I, Kreutz: Harvard Col- 

 lege Observatory Circulars: Magnetic Declination in Alaska, Schott: Deter- 

 minations of Latitude, etc., Preston, 75. — Relative Schwerebestimmungen : 

 Physical Geography, Tarr: Herschels and Modern Astronomy, Clerke: 

 Justus von Liebig, Shenstone, 76. — Bibliotheca Zoologica II: Zoologisches 

 Adressbuch : New York Academy of Sciences : Ostwald's Klassiker der Exakten 

 Wissenschaften, 77. 



Obituary — George Lawson: M. S. Bebb: Antonio del Castillo, 78. 



