194 



INDEX. 



Dilatation theory, 155, 156. 



Dirt-bands of Mer de Glace, observed 

 by Prof. Forbes, 130; description and 

 explanation of, 131, 132. 



Distillation, oceanic, 18; ordinary, 21. 



D6me du Goiite, broken crags of, 56. 



Drifting of huts on ice, 59, 60. 



Dr. William Hopkins's conclusions re- 

 garding the obliquity of the lateral 

 crevasses, 107. 



E 



Egralets, passage through the, 53. 



Electric light, dark waves of, 14. 



Equivalent points, comparison of veloci- 

 ties of, 75, 76, 106. 



Erratic blocks, 147-150. 



Evaporation, caused by the heat-rays of 

 the sun, 13. 



Expansion of water, 121, 155. 



Experiments to show the heat-power of 

 the dark rays, 14-19; illustrative, 22, 

 23, 25, 26; Dr. Franklin's experi- 

 ment, 112. 



Extract from Bordier's book, 157, 162. 



F 



Faraday's theory regarding regelation, 

 171; special solidifying power ex- 

 erted by substances upon their own 

 molecules, 172, 173; opinion of Prof. 

 James Thompson, 174, 175; experi- 

 ments illustrating the subject, 174; 

 quotation from Faraday, 1^5. 



Fog, its formation in ballrooms, 5. 



Forces, of crystallization, 30; of gravi- 

 tation, 30; of Nature, 31; attractive 

 and repulsive, 127. 



Freezing mixture, 120, 168. 



G 



Glacier, the source of the Rhone, 7 ; fed 

 by mountain-snow, 7. 21; melted by 

 the sun's dark ray?. 13 ; terminal mo- 

 raines of, 38; questions regarding 

 motions of, 54-58 ; action of the ends 

 of, 58 ; motion at top and bottom of, 

 80, 81 ; lateral compression of, 81, 82; 

 longitudinal compression of, 84, 85; 

 slow movement in winter of, 87; 

 motion of Grindelwald, 94; motion 

 of Great Aletsch, 94; motion of Mor- 

 teratsch, 95 ; crevasses at the side of, 

 106: action, 146, 147; ice, 155; veined 

 or ribboned structure of, 178; blue 

 veins of, 176 ; tables, 113, 114; mills, 

 116-118 ; theory of Scheuchzer re- 

 garding, 155; ancient, 145-147; im- 

 purities thrust out by. 144; white- 

 ness of a clean, 43, 176; measure- 



ments by Hugi and Agassiz of, 59, 

 60 ; epoch, 152-167. 



Glacier des Bois, description of, 38^3. 



des Bossons, 56; mass of ice upon, 



134. 



of Aletsch, sand-cones of, 116. 



des Periades. 51. 



du Talefre, boundary of, 53; width 



of, 82; chasms of the* 98. 



de Lechaud, motion of, 80 ; width of, 



82; compression of, 190. 



du Geant, neve of the, 49; motion of, 



79 ; width of, 82; cracks above the 

 ice-falls of, 99; honey-combing of, 

 115; shortening of, 190. 



Unteraar, movement of, 61 ; appear- 

 ance of Prof. Forbes on, 161; meas- 

 urements by Agassiz on, 162. 



Gormer, sand-cones of, 116 ; descrip- 

 tion of, 140-144; moraines of, 143; 

 advance and retreat of, 144 ; objects 

 of interest on, 144; structure and 

 bedding on, 181. 



Grand Plateau, crevasse on, 57, 118. 



Greenland's icy mountains, 21. 



Growth of knowledge, 59. 



Guesses in science, "74. 



Harmony of life and its conditions, 125. 



Heat, waves of, 12; invisible, 14; office 

 of the invisible waves of, 36 ; ab- 

 sorption of solar, 100; demanded for 

 the liquefaction of ice, 134 ; latent, 

 153. 



Hoar-frost, 5, 6; not melted by light- 

 waves, 18, 18. 



Hotel des Neuchatelois, movements of, 

 60. 



at Riffelberg, 141. 



Ice, structure of. 35. 36, 119 ; towers of, 

 104; sea. 132-134; retreat of. 145; 

 development in the Alps of. 150; 

 freezing of pieces of, 164 : liquefac- 

 tion by pressure of, 168, 169; trans- 

 lucent* 177 ; difference between hard 

 and soft, 87. 



Icebergs, of arctic spas. 153: desorib^d 

 bv Sir Leopold McClintock, 133. 134 : 

 drifting of, 134; origin of, 134; of 

 Switzerland, 136-138; colors of, 138; 

 formation of chains of. 165. 



Ice-lens, concentration of sun's rays by 

 means of, 37. 



Ice-river through the vale of Hasli. 146. 



Icicles, 99 ; how produced, 100 ; a theory 

 of, 100-102. 



Imagination, scientific use of. 34. 



Impurities thrust out bv glaciers, 144. 



Infinite Wisdom, designs of, 124. 



