INDEX. 



321 



Howorth, Mr., on mammoth in 

 Europe, 186 

 ,, on evidence from 



shells, 183 

 ,, on plants of Can- 



stadt, 189 

 cited, ISO, 182, 

 187 

 Huggins, Mr., on nebula, 80S 

 Hull, Prof. , on great Irwell fault, 



268 

 Hutton, Dr., on expansive force of 



ice in freezing, 215 

 Hypothesis, reason for avoiding, 26 



ICE of Greenland and Antarctic 

 continent, 64 

 ,, at S. Pole, why it is thick, 



78, 81 

 ,, another reason why it does 



not melt, 123 

 , , permanent without perpetual 



snow, 89 

 ,, melting point lowered by 



pressure, 215, 227 

 , , melting, resulting from mutual 

 reaction of the physical 

 causes, 122 

 ,, paleochrystic, 77 

 ,, cliffs of America, 192 

 , , how moved up hill slopes, 255 

 Icebergs, Antarctic, peculiar ice 

 formation of, 70 

 ,, testimony of, 207 

 ,, found in SouthernOcean, 



207 

 , , of Southern Ocean, enor- 

 mous size of, 208 

 ,, mean density of, 209 

 ,, estimates of their thick- 

 ness, 209 

 , , height of, determined by 

 their mean density, 

 210 

 Ice-sheet, Antarctic, conditions of, 

 202 

 , , of north- westernEurope, 



extent of, 246 

 , , interior of, warmer than 



surface, 217 

 ,, explanation of passage 

 across valleys, 255 



Ice strata, variations is not due to 



pressure or melting, 



231 



,, thinning out of, due to 



dispersion, 232 



Incandescence of Nebulous masses, 



how produced, 284 

 Indiga, port of, 182 

 Interglacial beds of Scotland, 130 

 ,, of England, 131 



,, of Germany, 133 



,, of Switzerland, 



133 

 Interglacial climate, characteris- 

 tics of, 185 

 ,, periods in Siberia, 



184 ^ 

 Interglacial periods in Greenland, 

 195 

 ,, of Pleistocene 



times, 127 

 ,, interval be- 



tween, 137 

 ,, difficulty in 



detecting cli- 

 matic charac- 

 ter, 135 

 ,, objection as to 



the number 

 of, 137 

 ,, probably five, 



137 

 ,, number de- 



tected in 

 Germany, 

 Denmark, & a, 

 138 

 , , shorter than 



Glacial, 141 

 ,, less marked in 



temperate 

 regions than 

 Glacial, 141 

 Intertropical water, effect on polar 



climate, 165 

 Internal heat of the earth, 2 



JA.MIESON, Mr. on ice mark- 

 ings on Schiehallion, 212 

 Jenson, on Greenland ice, 64 

 Jentzsch, Dr., on German Inter- 

 glacial beds, 133 



