GENERAL INDEX. 



Double refractiug crystals, ix. 68 



stars, i. 86 ; vii. 203 



Doublets, viii. 108 



Dragon-fly, ix. 89 



Drawings and engravings, vi. 51 



Drebbel's air thermometer, vi. 159 



Dresden porcelain, ii. 155 



Driving wheels, vi. 118 



Drone, the, x. 9, 11, 33, 52, 75 



Dry fogs, ii. 82 



steam, v. 5 



Drying processes, ii. 100 



Dubosc, M., viii. 201 



Duhamel du Monceau's experiments, 

 i. 118 



Duplex escapement, vi. 37 



Dureaux de la Mai on hawks and fal- 

 cons, viii. 166 



EAGLE, the, viii. 167 



Earth, the, i. 10 ; ii. 73 ; iii. 41 ; 



vi. 195; ix. 130 ; xi. 33 

 Earthlight at the moon, iii. 42 

 Earthquakes and volcanoes, iv. 150 ; 



xi. 83 



Easter, vii. 9 



Eastern continent, ix. 157 

 Ecclesiastical moon, vii. 11 

 Eclipses, xii. 162 

 Ecliptic, vii. 43 

 Egypt, pyramids of, iv. 207 

 roads, iii. 10 



months or years, v. 148 ; ib. 155 



Ehrenberg, M., xi. 131 ; ib. 168 



Electric current, iii. 118 



telegraph, i. 179 ; iii. 14 ; 



ib. 116 ; iv. 31 

 Electricity, iii. 118 



lectro-chemical pen, iv. 47 

 E lectro-magnet, iii. 197 ; x. 196 

 Electro-motive power, x. 193 

 Elements, the ; ideas of the ancients, 



ii. 9 



Elephant, the, viii. 157 

 Elers, Messrs., their pottery, ii. 140 

 Elie de Beaumont, M., xi. 82 ; xii. 22' 

 Encke's comet, ii. 67 ; xi. 195 

 Engines, high and low pressure, v. 29 

 England, iii. 24 ; iv. 141 ; xi. 124 

 Ensenheim, meteoric stone at, i. 139 

 Eutrecolles, Father, ii. 150 

 Epact, vii. 14 

 Epidemics, iL 77 



Equation of time, v. 133 



Equator, i. 98 ; iii. 57 



Equatorial and polar waters, inter- 

 change of, iii. 78 



Equinoctial points, v. 166 



Equinox, the day of, v. 165 ; vii. 30 



Equinoxes, precession of the, v. 167 



Eras, vii. 24 ; ib. 55 



Erie canal, ii. 19 



Eruptions, ii. 79 ; iv. 172 



Escapement wheel, vi. 18 ; ib. 34 



Ether, i. 195 



Ethiopian, viii. 85 



Etna, Mount, xi. 108 



Etruria, in Staffordshire, ii. 142 



Europe, outlines of, ix. 140 



European and American Telegraph 

 Company, iv. 118 ; vi. 143 



Evaporation, ii. 99 ; iii. 89 ; iv. 200 



Evening star, vii. 44 



Explosion of steam-boilers, ii. 25 



Eye, the, i. 9 ; ib. 85 ; v. 50 ; viii. 71 



Eye-piece of microscope, ix. 25 



FACIAL angle, viii. 54 



Factory engine, v. 34 



Facules and Lucules, iii. 108 



Fahrenheit's thermometer, vi. 155 



Fairbairn, W., x. 167 



Fan, i. 94 



Faye, M., xi. 165 



Feathering paddles, x. 156 



February, v. 150 



Filaments of wool, silk, and fur, vi. 200 



Filtering-paper, ii. 102 



Fingal's cave, xi. 79 



Finisterre, system of, xii. 12 



Fire, ii. 193 ; iv. 132 



balls, i. 133 ; ib. 150 



damp, ii. 199 ; iv. 188 



engine, v. 191 



syringe, i. 136 



works, i. 86 



wells in China, iv. 168 



Firmament, iii. 55 ; v. 73 ; vii. 146 

 Fishes, iv. 174 ; vi. 76 ; viii. 157 

 Flame, ii. 198 ; iv. 189 

 Flaugergue's observations on the baro- 

 meter, i. 76 

 Flannel, i. 94 

 Flaxman, Mr., ii. 143 

 Flies, v. 106 

 Floral clock of Linnaeus, i. 11 



197 



