LOUIS ELSBERG. 



Page. 



On the Cell-Doctrine, and the Bioplasson-Doctrine, (Nov. 21, 



1881), ivith four wood-cuts 31 



ARTHUR H. ELLIOTT. 



The Methods of Ascertaining the Safety of Kerosene Oil, (March 



13,1882) 137 



H. L. FAIRCHILD. 



On a Peculiar Coal-like Transformation of Peat, recently discov- 

 ered at Scranton, Penn., (Dec. 19, 1881) 7' 



Methods of Animal Locomotion, (May 8, 1882) 164 



JOHN H. FURMAN. 



The Geology of the Copper Region of Northern Texas and the 



Indian Territory (Oct. 31, 1881), with one wood-cut 15 



ERNST VON HESSE-WARTEGG. 



The Submarine Tunnel between England and France, (Lecture. 



April 17, 1882) 155 



WM. EARL HIDDEN. 

 The Discovery of Emeralds in North Carolina, (Jan. 30, 1882). . . loi 

 A Phenomenal Find of Fluid-bearing Quartz Crystals, (March 6, 



1882) 131 



CHARLES F. HIMES. 



Stereoscopic Notes, (Feb. 13, 1882) 114 



ROMYN HITCHCOCK. 



Recent Advances in Photography, (May 29, 1882) 176 



LAURENCE JOHNSON. 

 The Parallel Drift-Hills of Western New York, (Jan. 9, 1882). . . 77 



ALEXIS A. JULIEN. 



The Excavation of the Bed of the Kaaterskill, N. Y.. (Nov. 14, 



1881) 24 



The Volcanic Tuffs of Challis. Idaho, and other Western Locali- 

 ties, (Dec. 5. 1 881), with one woodcut 49 



ALBERT R. LEEDS. 



Diphenylamine-Acrolein, (Feb. 27, 1 882) 127 



BENJAMIN N. MARTIN. 



The Moral Bearing of Recent Physical Theories, (Lecture, Jan. 



23,1882) 96 



