GENERAL INDEX. 



Florida, peninsula of, ix. 155 



Flourens, M., viii. 164 



Fluids, ii. 4 



Fluted wire, vi. 19 



Fly-wheel, v. 41 



Focal length and principal focus, vii. 



98 



Focussing, ix. 27 

 Fog signals, i. 174 

 Fogs, ii. 82 ; iii. 94 

 Foot of man, viii. 60 

 Forbes, Prof., xi. 94 

 Forcing pump, v. 188 

 Fore and after milk, vi. 3 

 Forest, American, xi. 93 

 Forked lightning, v. 74 

 Fossils, different, xi. 59, 63 ; ib. 



130-4 ; ib. 136 ; ib. xii. 35 

 Foucault, M., iii. 58 

 Foundlings, viii. 82 

 Fractional magnitude, vii. 184 

 France, iii. 4 ; ix. 140 ; xii. 60 

 Franklin, Dr., viii. 140 

 Freezing by radiation of heat, i. 116 

 Freezing point and boiling point, vi. 



183 



Frog's tongue, v. 65 

 Froment, M.,;iv. 38 ; ib. 46 ; vi. 53 ; 



x. 195, 205-7-8 

 Frozen sea, iii. 75 

 Fruits, tropical, transport of, iii. 9 

 Fuel, iv. 205 ; v. 15, 143 

 Fulgurites, x. 183 

 Full moon, vii. 49 

 Fumarolles, xi. 116 

 Fusee in time-pieces, vi. 24 

 Fusion by heat, vi. 146 



GAD-PLY, viii. 134 



Galactic circle, viii. 11 



Galen, viii. 67 



Galileo, i. 43 ; iii. 54 ; v. 102 ; 



vi. 7 



Gaile, i. 55 ; vi. 180 

 Galvanic battery, iii. 120 

 Galvanometer, iii. 194 

 Garden watering pumps, v. 191 

 Gases, ii. 9 



Gasparis' discovery of planets,, vi. 168 

 Gauge, steam, v. 9 ; ib. 44 

 Gay Lussac, iv. 185 

 Gearings, x. 166 

 Geography, ix. 130 ; xi. 34 



19.8 



Geological horizon, xii. 25 



periods, ib. 29 



phenomena, xi. 121 



Geology, viii. 105 ; xi. 6 

 Geometrical problem of the globe, 



x. 31 

 German pottery, ii. 138 



sepulchres, ii. 122 



Germany, iv. 26 ; iii. 14 



Geysers, xi. 116 



Giant's Causeway, xi. 78 



Glasgow Saturday journals, iv. 85 



Glazing, potter's, ii. 184 



Globe, the, xi. 53 



Globules of blood, vi. 100 



Glow-worm, ix. 203 



Gnat, the, ii. 90 



Gneiss, xi. 41 



Gold, vi. 198 



Golden number, the, v. 158 ; vii. 14 



Goniometers, ix. 58 



Goring, Dr., vi. 75 ; ix. 13 



Graham's discovery of the planet 



Metis, vi. 168 

 Grain, i. 119 

 Granite, xi. 39 

 Grates, ii. 202 

 Gravitation, iii. 103 

 Great Britain steamer, x. 169 

 Greece, iii. 19 ; ix. 141 

 Greek months, v. 148 

 Greenland, ix. 155; xi. 92 

 Greenwich, i. 100 ; iv. 101 

 Gregorian calendar, v. 170 

 Grove's battery, iii. 127 

 Growth, its effects, viii. 79 

 Guacamayo, volcano of, iv. 172 

 Gulf of Mexico, ix. 151 

 Gymnopleurus pilularius, viii. 138 



HADLEY'S sextant, i. 105 

 Hail, iii. 95 



Hainault, system of, xii. 15 

 Hale du Bivouac, i. 122 

 Halley's comet, ii. 69 ; xi. 175 

 Hamster, the, viii. 57 

 Hand, the, viii. 57 

 Hannonsr, Paul, ii. 164 

 Harmattan of Africa, ii. 85 

 Harmony, xii. 192 

 Hawk, the, viii. 166 

 Heat, i. 7 ; iii. 66 j vi. 145 ; ix. 

 181 ; x. 46 



