636 



INDEX. 



Double stars, computation of orbits of, 



xxxi. 

 Doubleday, Heury, 592. 

 Doulton & Co., 424. 

 Dousmau, Mr. H. F., 418. 

 Dove, Prof., xxxviii., 85. 

 Dover Castle, Roman pharas in, 150. 

 Dranista, coal-field near, 241. 

 Draper, Dr. Henry, xx. 



Dr. John W., lviii., 120, 517. 



Mr., 112. 

 Drecbsel, Mr., xci. 

 Drechsler, Prof., clxxiii. 

 Dresser, Mr. H. G., ccvii. 

 Drew, Mr. Frederick, clxviii. 

 Dreyer, Mr., 50. 

 Drosera, ccx. 

 Dry rot of the lemon, 391. 

 Dry season of Brazil, 79. 

 Dry-dock, an improved, 50S. 

 Drvness of the soil in India, 94. 

 Duane, General, 129, ISO. 

 Duchemin, Mr., lOi, 200. 

 Duclos, Father, 115. 

 Ducloux, Mr., xcix. 

 Ducretet, Mr., lxxiii.. 196. 

 Dufour, General H. W., 592. 



Mr., 120. 



Prof., 172. 

 Duhamel, Mr., 115. 

 Dnjardiu-Beaumetz, Mr., 559. 

 Dulong and Petit, Messrs., 213. 



and Petit's law, 120. 

 Dumas, Prof., and the phylloxera, 3S8. 

 Du Moncel, Count, 200. 

 Dunning, Mr. S.Wright, ccxlii. 

 Duplex telegraphy, history of, 471. 

 Duraud, Abbe, clxvi. 

 Dust-spectacles, 44G. 

 Dutton, Captain C. E., 2S9. 

 Duval, Mr., cxlvii. 

 Dwellings, improved, 453. 

 Dyeing feathers green, 525. 



horse-hair, 527. 

 Dye-stuffs in fabrics, test for, 550. 

 Dves of Croissant and Bretonniere, new, 



529. 

 Dynamite, 480. 



Dynamo-electric machine, cclxxii. 

 Dytiscus marginalis, cxcii. 



E. 



Eads, Captain J. B., ccxlii. 



Eames, Dr. C. J., cclxix. 



Ear of man and the mammalia, 311. 



Earle, Rev. J., clvi. 



Earth, figure of, G7. 



retardation of rotation of, 20. 

 Earth-currents on telegraphic lines, 159, 

 163. 

 -worms, destruction of, 3S9. 

 Earthquake near New York, 1S74, 93. 

 of Belluno, 65. 

 of 22d October, 1873, 66. 

 Earthquakes and magnetic disturbances, 



64. 

 East River bridge, ccliii. 

 Eaton, Prof. D. C., 363. 



Rev. A. E., clxxvii., cxcvii. 

 Ebermayer, Mr., 20S. 

 Ebonite, preparation of, 543. 

 Ebullition phenomena, 124. 

 Echinoderms, clxxx. 

 Eehitas scolaris, xcii. 



Ecke, Dr., xxxviii. 



Eckers, Heir, clxii. 



Economy, domestic, 441. 



Edison and Prescott, Messrs., cclxxii. 



Edlund, Prof., lxxii., 157, 471. 



Edmunds, Dr., 411, 413, 419. 



Edwards, Mr. W. H., cxcvi., 357. 



Rev. Dr., cxxxix. 

 Eells, Rev. Mr., clxiv. 

 Eels, habits of, 346. 

 Effect of polluted water on fishes, 416. 

 Effects of the same temperature upon 



plants of different latitudes, ccxii. 

 Efficiency of ancient weapons, 32S. 

 Egg-pigments, cciii. 



Eggs, method of distinguishing impreg- 

 nated, 44S. 

 preserving, 456. 

 Egg-shells? is sex distinguishable in, 320. 

 Egypt, solar radiation in, 42. 

 Egyptian astronomical observations, an- 

 cient, 61. 

 Ehrenberg, Mr., 73. 

 Eichens, Mr., 30. 

 Eichhoru, Mr., ccxxi., 3S3. 

 Eidam, Mr. E., ccxii. 

 Ekstrand, Mr., Ixxxiv. 

 Elasticity of Iceland spar, 175. 

 Electric charge of a conducting wire, 159. 

 conductivity of ligneous sub- 

 stances, 200. 

 unilateral, 195. 

 currents and the fertilized eggs 

 of frogs, 316. 

 formation of magnetism 

 by, 166. 

 discharge, 196. 



effect of magnetism on, 

 165. 

 discharges in vacuo, 158. 



of Aurora Borealis, 

 50. 

 force, velocity of transmission, 



157. 

 fuses, 4SS. 

 light at La Have, 149. 



for locomotives, 151. 

 power of, 150. 

 Electrical clock in Pittsburgh, 3. 



condition of spring water, 101. 

 fish-bait, 434. 



light for signaling, cclxxii. 

 machine, theory of, 199. 

 voting-machine, 19S. 

 Electricity, lxxii. 



action of, on phosphorus, 160. 

 and heat, 125. 

 atmospheric, 97. 

 Edlnnd's theory of, 157. 

 evaporation of metals by, 128. 

 for head-lights of locomotives, 



512. 

 of mineral waters, 15S. 

 terrestrial, xxxiv. 

 transmission of mechanical 



power, 122. 

 unilateral conductivity of, 159. 

 Electrolysis, formation of magnets by, 



164. 

 Electro-magnet, action upon the spectra 



of gases, 194. 

 Elias, Mr. Ney, cxxviii. 

 Ellery, Mr., xxx., xxxii., 29. 

 Elliot, Major, report on light-houses, 145. 



