CONTENTS. 



Page 



Art. XVIII. — Discharge-current from a Surface of large 



Curvature; by J. E. Almt __ _.; 175 



XIX. — Octahedrite and Brookite, from Brindletown, North 



Carolina ; by H. H. Robinson _ 180 



XX. — Behavior of Small closed Cylinders in Organ-pipes ; 



by B. Davis . ._ 185 



XXI. — Caesium-Tellurium Fluoride ; by H. L. Wells and 



J. M. Willis 190 



XXII. — Double Chlorides of Caesium and Thorium ; by H. 



L. Wells and J. M. Willis _ 191 



XXIII. — Studies of Eocene Mammalia in the Marsh Collec- 

 tion, Peabody Museum ; by J. L. Wortman „.. 193 



XXIV. — Separation of the Least Volatile Gases of Atmos- 

 pheric Air, and their Spectra ; by G. D. Liveing and 

 J. Dewak.. __ 207 



XXV. — Estimation of Calcium, Strontium, and Barium, as 



the Oxalates ; by C. A. Peters __ 216 



XXVI. — Calaverite; by S. L. Penpield and W. E. Ford 225 



SCIENTIFIC INTELLIGENCE. 



Miscellaneous Scientific Intelligence — Temporary Set, C. Barus; Some new 



rock-types, 247. 

 Obituary — Joseph LsConte, 248. 



