596 



INDEX. 



Dove-color on raw wool, 494. 



Dozen, value of the, 2. 



Dragometer, Palmieri's, 49T. 



Draper, Dr., 142, 269. 



Drawbridges, revolving, 4G7. 



Dredging for amber, 224. 



Drosera, secretion of, 359. 



Dry thunder-storms, 128. 



Dry-dock, a new, 468. 



Drying of hay and grain, artificial, 378. 



Duane, General, 459. 



Dubois, 471. 



Duderhof Mountain, 6. 



Dufour, lis. 



Dumas, 380, 381. 



Dunker, Dr., 119. 



Dunn, M. H., 401. 



Duplex telegraphy, 168, 169. 



Durable glue, 511. 



Duruof, 450. 



Dust, exclusion of, from the lungs, 538. 



Dust-shower, remarkable, 83. 



Duttou, Capt. Clarence E., 256, 261. 



Dyeing black with cerium salts, 491. 



cotton pure blue, 493. 



parchment paper, 489. 



silk, 490. 

 Dymond, 66. 

 Dynamometer, simple, 135. 



E. 



Earth, interior structure of the, 121. 

 internal heat of the, 74. 

 internal temperature of the, 119. 

 rotation of the, influenced by the 



tides, 130. 

 temperature at Konigsberg, 120. 

 temperature of the, 98. 

 Earth's axis, changes in the, 78. 



rotation, influence of the, on river 

 currents, 119. 

 Earthquakes in Italy, 72. 

 East Indian telegraphy, 170. 

 Eastward progress of storms, 124. 

 Ebermeyer, 361. 

 Ebonite, action of light on, 176. 

 Eclipse of the sun, an ancient, 10. 



a total, in 1871,11. 

 solar, April 16, 1874, 58. 

 Economy, domestic and household, 411. 

 Edwards, F.E., 542. 

 Eels in Cochin China, 403. 

 Esgs of birds, coloring matter of, 304. 

 Egyptian chronology, 42. 

 Ehrenberg, Prof. C. G., 542. 

 Elfeococca Veruicia, 357. 

 Elasticity of gases, 143. 



of purified air, 143. 

 of rock-salt, 136. 

 Electric apparatus for railroads, new, 

 170. 

 arc, resistance of, 175. 

 light for signaling, 461. 

 light-house, 460. 

 machine, the Gramme, 165. 

 Electrical alarm against carbonic oxide, 

 540. 

 discharges, phenomena with, 



167. 

 illumination of factories, 413. 

 light, curious, 167. 

 Electricity and light, new relation be- 

 tween, 163. 



Electricity, atmospheric, 170. 



conduction by compounds of 



sulphur, 166. 

 from dipping metals in fluids, 



163. 

 hatching silk-worms by, 331. 

 Electro-capillary motor, 142, 4^9. 

 Elephant, probable extinction of, 304. 

 Elephants, dogs, etc., of New Mexico, fos- 

 sil, 303. 

 Elk, remains of the Irish, 300. 

 Elliott, Major, 411. 



Henry W., 389. 

 Elm of Boston Common, the, 347. 

 Elodea Canadensis, 287. 

 Embryological data for the classification 



of vertebrates, 296. 

 Embryology of gastropods, 338. 

 Emma Furnace, the, 433. 

 Enameling on brass and German silver, 



515. 

 Endemic pellagra and Indian corn, 535. 

 Endlich,F.M.,249. 

 Energy and gravitation, 135. 

 Engelmann, Dr. George, 350. 

 Engineering and mechanics, 431. 

 Engraving on wood, French method of, 



483. 

 Entomological specimens, preservation 



of, 275. 

 Eosin, a new fluorescent dye-stuff, 492. 

 Eozoou Canadense, 341. 

 Epigsea, heteromorphism in, 351. 

 Equilibrium of forces, 2. 

 Erck,W.,lS. 

 Ericsson, John, 40. 

 Ertel, 6. 



Erva de Eato, 526. 

 Esbeth, Dr., 272. 

 Etching photographs, 479. 

 Ethnographic work in the Rockv Mount- 

 ains, 261. 

 Euler, 3. 



Euplectella, gathering of, 340. 

 Europe, barometric pressure in, S3. 



frequency of thunder-storms in, 



129. 

 mineral products of, 1874, 437. 

 European drought of 1875, 91. 



fresh -water fishes, new work 

 on, 319. 

 Evaporation from the skins of fruit, 



369. 

 Evolution, Cope's theory of, 276. 



of the horse, 281. 

 Ewald, 285. 

 Exner, 141. 

 Experiments on steel, 202. 



upon non-luminous flames, 



149. 



Explorations around the North Cape, 296. 



made under the direction 



of F.V. Haydeu, 1876, 242. 



of Lieut. George M.Wheeler, 



262. 

 of the Rockv Mountain re- 

 gion by J.W. Powell, 255. 

 Explosions in flour-mills, 428. 

 Explosives for fog signaling, 462. 



researches on, 459. 

 Extinction of the elephant, probable, 



304. 

 Extinguishment of conflagrations, 464. 

 Eye of flies, the, 326. 



