viii CONTENTS. 



Number 234. 



Page 



Art. LIII. — Professor Elias Loomis. With a plate 427 



LIV. — Magnetic Field in the Jefferson Physical Laboratory. 



Part II; by R. W. Willson 456 



LV. — Electrical Resistance of the Alloys of Ferro-Manganese 

 and Copper ; (from determinations made by Mr. B. H. 

 Blood) ; by E. L. Nichols ... 471 



LVI. — Fluid Volume and its Relation to Pressure and Tem- 

 perature ; by C. Barus _ 478 



LVII. — Hamlinite, a new rhombohedral Mineral from the 

 Herderite locality at Stoneham, Me. ; by W. E. Hidden 

 and S. L. Penfield 511 



LVIII. — Large spring-balance Electrometer for measuring 

 (before an audience) specific inductive capacities and 

 potentials; by A. M. Mayer. __ 513 



LIX. — Appendix. — Notice of New Tertiary Mammals ; by 



O. C. Marsh _ 523 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Emission-spectrum of Ammonia, Magnanini : Absorption- 

 spectrum of Nitrosyl chloride, Magnanini, 5 IS. — Dictionary of Applied Chem- 

 istry, T. E. Thorpe : Method of obtaining the oscillatory discharge used by 

 Hertz, H. Classen : Oscillatory discharge of the Ruhmkorf coil, R. Colley : 

 Application of Photography to the study of superficial Tension, Smith, 519. — 

 Suppression of Photographic Halos, Paul Henry and Prosper Henry, 520. 



Geology and Mineralogy — Potomac or Younger Mesozoic Flora, "W. M. Fontaine : 

 Geological Survey of Missouri, Bulletin No. 1, 520. — Preliminary Check list of 

 the Cretaceous Invertebrate fossils of Texas, R. T. Hill : Geological Map of 

 Scandinavia : Gems and Precious Stones of North America, G. F. Kunz, 521. 



Miscellaneous Scientific Intelligence — Fall of Meteorites in Iowa, J. Torrey, Jr., 

 and E. H. Barbour : Orbit of the Meteor of May 2d, 522. 



Appendix — List of papers by Professor Elias Loomis. 

 Index to Volume XXXIX, 52*7. 



