De Candolle on plants i 

 geological age, Dana, 4 



DevilU and Debray, densii 

 iridium and their alloys 



Dinocerata, characters o 

 Diplometer, 403. 



Dixon, E. M, nitric acid from air, 



Draper, J. D., power of solution 



nine to rotate polarized light, 4 



Douval-Jouve, J., on leaves of g 



Duclaux, separation of mixed liqui( 



Edlund, dependence of electrical i 



spark, action of magnetism on, 57. 

 with large batteries, 322. 

 Electricity and light, 55. 



Leyden jar regulator, 221. 

 velocity of, Lovering, 211. 



Engelmann, G., on Agave, noticed, 235. 

 Engineers, report of chief of, 243. 

 Ethyl succinate, Bemsen, 129. 

 Exner, change of volume of electric con- 



Farlow, W. G., on Fungi, noticed, 414. 

 Flame and air, transparency of, 146. 

 Flint-implements from drift, WaUace,195. 

 Fontaine, conglomerates of W. Virginia, 



276, 374. 

 Ford, S. W., fossUs of Primordial, 369. 

 Forsyth, Yellowstone expedition, 79. 

 Friction, sliding, on an inclined plane, 



Kimball, 181. 

 Friedberg, purification of carbon disul- 



meteorites, Wright, 253. 

 specific heat of, 403. 

 Gastaldi, Paleozoic serpentine, 4 



Geological Eeports o 



Alabama, 410; 40th, Parallel (King's), 

 IC], 501; Georgia, 229; Illinois, 68, 

 231 ; New Jersey, 498 ; North Caro- 



62 ; Territories (Hayden's), 147, ] 

 231 , 245, 332, 422, 496 ; Victoria, 21 

 Westo- - 



100th Meridian (Wheelei 



Map of U. States, ; 



Charts, C. King, It 



Geological Survey of B 



^cX 



