CONTENTS 



Pah 



Art. I. — Lecture Experiment with Liquid Carbon Dioxide; 



by C. Barus : 1 



11. — Observations on Percussion Figures on Cleavage plates 



ofMica; by T. L. Walker .. 5 



in. — Seven Day Weather Period ; by H. H. Clayton .-.. 1 



IV. — Pearceite, a Sulpharseuite of Silver and on the Crystal- 

 lization of Polybasite; by S. L. Penfield 17 



V. — Hj^drology of the Mississippi ; by J. L. Greenleaf... 29 



VI. — Preliminary Note on the Relations of Certain Body- 

 plates in the Dinichthyids; by C. R. Eastman 46 



VII. — Tertiary Floras, of the Yellowstone National Park ; 



by F. H. Knowlton , _ _ 51 



VIII. — New Belodont Reptile {Stegomus) from the Con- 

 necticut River Sandstone ; by O. C. Marsh. (With 

 Plate I.) 59 



IX. — Separation, and its bearing on Geology and Zoogeog- 

 raphy ; by A. E. Ortmann __ 63 



X. — lodometric Method for the Determination of Carbon 



Dioxide; by I. K. Phelps _ _.„ 70 



XL — The Opisthoteuthidse. A Remarkable New Family of 

 Deep Sea Cephalopoda, with remarks on some points in 

 Molluscan Morphology ; by A. E. Verrtll 74 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Fusibility of platinum in a blast-furnace fed by carbon, 

 Y. Meter: Condition of the water in analcite, C. Lepierre: Quantitative sep- 

 arations by means of hydrogen peroxide, Janjstasch, 81. — Use of -'heavy solu- 

 tions" in the examination of commercial fertilizers, A. P.Bryant: Action of 

 nittic acid upon potassium cobalti-cyanide, Jackson and Comet, 82. — Substitu- 

 tion of various substances in the place of the water of zeolites, G-. Friedel : 

 Elementary Treatise in Electricity and Magnetism, Gr. C. Foster and E. Atkin- 

 son, 83. 



Geology and Natural History — United States Geological Survey, 84. — American 

 Paleontology Prize, 85. — Midway Stage, G. D. Harris: Student's Lyell, a 

 Manual of elementary Geology, J. "W. Judd, 86. — Chloritoid from Michigan, W. 

 H. HoBBS, 87. — Report of the Section of Chemistry and Mineralogy, G. C. 

 Hoffmann : Les Mines d'Or du Transvaal, L. De I/AUNAT, 88 — Lehrbuch der 

 Okologischen Pflanzen-geographie, E, Warming: Seventh Annual Report of 

 Missouri Botanical Garden, 89. 



Miscellaneous Scientific Intelligence— E-Qi^i of the luminous night-clouds, 89. 

 — Publications of the Washburn Observatory of the University of Wisconsin : 

 Mathematical papers read at the International Mathematical Congress held in 

 connection with the World's Columbian Exposition, Chicago, 189.3 : American 

 Association for the Advancement of Science : British Association for the Ad- 

 vancement of Science: Journal of Physical Chemistry, 90. 



Obituary— 3 OSEFU Prestwich: M. DAUBiiiE, 90. 



