CONTENTS 



Page. 



Art. LV. — Experimental Comparison of Formulae for Total 

 Radiation between 15° C. and 110° C; by W. LeConte 



Stevens . . . 1 43 1 



LVI. — Notes on Silver; by M. C. Lea 444 



LVIL— Notes on Silver Chlorides; by M. C. Lea.. 446 



LVIII. — Remarkable Fauna at the Base of the Burlington 



Limestone in Northeastern Missouri; by C. R. Keyes. 447 

 LIX. — Glacial Pot-holes in California; by H. W. Turner 



(With Plate IX)... 453 



LX. — Lavas of Mount Ingalls, California; by H. W. Turner 455 



LXI. — Method for the Quantitative Separation of Barium 

 from Strontium by the action of Amyl Alcohol on the 

 Bromides; by P. E. Browning . .^ . 459 



LXII. — Note on the method for the Quantitative Separation 

 of Strontium from Calcium by the action of Amyl Alco- 

 hol on the Nitrates ; by P. E. Browning 462 



LXIII. — Study of the Formation of the Alloys of Tin and 

 Iron with descriptions of some new Alloys ; by W. P. 

 Headden ■„ 464 



LXIV. — Notes on the Cambrian Rocks of Pennsylvania and 

 Maryland from the Susquehanna to the Potomac; by 

 C. D. Walcott . . . .... 469 



LXV. — Volcanic Rocks of South Mountain in Pennsylvania 



and Maryland; by G. H. Williams. (With Plate X). 482 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Temperature of Steam from Boiling Salt-solutions, 

 Sakurai, 496. — Allotropisrn of Amorphous Carbon, Luzi : Amorphous Boron, 

 Moissan, 497. — Atomic Mass of Boron, Abeahall: Absorption power of 

 metals for the Energy of Electrical waves, Bjerknes: Electrical Oscillations, 

 M. Zehnder, 498. — Joints in Magnetic Circuits, Ewing: Measurement of high 

 temperatures, Holborn and Wien: Color Photography, Lippmann: Electrical 

 Resistance of Metals at Low Temperatures, Dewar and Fleming, 4.99. 



Geology and Natural History — Les Regions Invisibles du Globe et des Espaces 

 celestes: Eaux Souterraines, Tremblements de Terre. Meteorites, A. Paubkee, 

 499. — Pleistocene History of Northeastern Iowa, W. J. McGee: Geological 

 Survey of Iowa: "Tiefencontacte an den intrusiven Piabasen von New Jersey, 

 A. Andreae and A. Osann : Eleolite-Syenite of Litchfield, Me. and Red Hill, 

 N. H., "W. S. Batley, 500. — Gems and Precious Stones of North America, G 

 F. Kunz: Muciferous System of Laminariacea?,' Guignard: Researches on 

 Multiple Buds, W. Russell, 501.— Artificial intracellular Crystallization, E. 

 Belztjng: Aeration of Solid Tissues, H. Pevaux, 502. — Bibliotheca Zoologies, 

 II, 504. 



Miscellaneous Scientific Intelligence — National Academy of Sciences, 504. 



Index to Vol. XLIV, 505. 



Erratum. — Page 468, line 11 should read: difficultly soluble or insoluble, etc. 



