CONTENTS. 



Page 



Art. XXI. — Use of the Stereographio Projection for Geo- 

 graphical Maps and Sailing Charts ; by S. L. Penfield 245 

 XXII.— Hind Limb of Protostega; by S. W. Williston... 276 

 XXIII. — Physical Effects of Contact Metamorphism ; by 



Joseph Barrell _ _ 279 



XXIV. — Expedition to the Maldives ; by A. Agassiz 297 



XXV. — Flower-like Distortion of the Coronas due to Graded 



Cloudy Condensation ; by C. Barus _ _ 309 



XXVI. — Varying degrees of Actinism of the X-Rays ; by 



J. O. Heinze, Jr 313 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics— Separation of Hydrochloric and Hydrocyanic Acids, 

 Richards and Singer: Volumetric Determination of Copper, Antimony, Iron, 

 etc., by Means of Stannous Chloride, Weil, 315. — Comparison of the Properties 

 of Hydrogen Selenide with those of Hydrogen Sulphide, Forcand and Fonzes- 

 Diacon: Radio-active Thorium, Hofmann and Zerban, 316. — Lithium Anti- 

 monide, Lebeau: Synthesis of Formic Acid, Moissan : Elements of Physical 

 Chemistry, H. C. Jones, 317. — Velocity of Sound in Air and different Vapors 

 with Ordinary and High Temperatures, E. H. Stevens: Chemical Action of 

 Cathode Rays, G. C. Schmidt : Effects of Currents of High Frequency upon 

 the Human Body. H. Andriessen, 318. — Distribution of Electric Current on 

 Electrodes in rarefied Media, A. Wehnelt: Stratifications of Hydrogen, W. 

 Crookes: Magnetic Declination Chart for the United States in 1902: Die 

 Fortschritte der Physik im Jahre 1902; Halbmonatliches Litteratur-verzeich- 

 niss, K. Scheel and R. Assmann, 319. 



Geology — United States Geological Survey, 320.— Fauna and Geography of the 

 Maldive and Laccadive Archipelagoes, J. S: Gardiner: Formation of the 

 Maldives, J. S. Gardiner, 321.— Omdesenglaciale ogpostglacialenivaforandringer. 

 i Kristianihfeltet (Molluskfaunan), W. C. Brogger: Berkeley Hills ; A Detail 

 of Coast Range Geology, A. C. Lawson and 0. Palache, 322. — Gesteine der 

 Ecuatorianischen Ost-Cordillere, Der-Cotopaxi und die umgebenden Vulkanberge, 

 A. Young: Der grosse Staubfall vom 9. bis 12. Marz, 1901, in Nordafrika, 

 Siid- und Mitteleuropa, G. Hellmann and W. Meinardus, 323.— Ricerche 

 Petrografiche e Geologiche sulla Valsesia di E. Artini e G. Melzi: Influence 

 of Country Rock on Mineral Veins, W. H. Weed : Additional notes on the 

 Cambrian of Cape Breton, with descriptions of new species, G. F. Matthew, 

 324.— Analysis of Mount Vernon Loess, N. Knight. 



Botany and Zoology — Horticultural Experiments and Botanical Investigations at 

 the Harvard Station in Cuba, 325. — Professor van Tieghem's Classification of 

 Plants, 32(5. — Botanisches Ceutralblatt: Additions to the Fauna of the 

 Bermudas from the Yale Expedition of 1901, with Notes on Other Species, A. 

 E. Verrill: (1) Variations and Nomenclature of Bermudian, West Indian, and 

 Brazilian Reef Corals, with Notes on the Various Indo-Pacific Corals ; (2) Com- 

 parisons of Bermudian, West Indian, and Brazilian Coral Faunas, A. E. Verrill, 

 327. — Some Spiders and Mites from the Bermuda Islands, N. Banks: Marine 

 and Terrestrial Isopods of the Bermudas, with Descriptions of New Genera 

 and Species, H. Kichardson, 328. — British Museum Catalogues: Bermuda and 

 the Challenger Expedition, G. W. Cole, 329. 



Miscellaneous Scientific Intelligence — Report of the Secretary of the Smithsonian 

 Institution for the Year ending June 30, 1901 : Important Discovery in Color 

 Photography :-529. — Lehrbuch der Meteorologie, J. Hann: American Philo- 

 sophical Society: New Theory of Evolution, A. W. Smith, 330. 



Obituary — Albert Ripley Leeds. 



