INDEX 



ACER pseudo-platinus, 189 

 "Adamshina," 181, 193 

 Aerial currents, heat of, 23 



,, currents, misapprehensions 

 regarding, 23 

 Age of sun, 282 

 ,, of sun in relation to evolu- 

 tion, 288 

 Air at the Equator, why not 



hotter in January, 59-63 

 Alnaster fruticosus, 183 

 ,, in Siberia, 184 

 Alps, elevation of, 174 

 Alternations of climate, evidence 



of, 160 

 Anodonta anatina, 184 

 Antarctic ground under ice, tem- 

 perature of, 226 

 ,, land flatness proved by 

 stratification of ice, 229 

 ,, continent, ice of, 64 

 Antarctic ice, Captain Sir F. J. 0. 

 Evans' Theory of, 

 77 

 , , formed on fiat land, 



72-78 

 , , and geographical 



conditions, 110 

 ,, on the melting of, 



111 

 , , present extension, 



cause of, 113 

 ,, temperature of, 213 



, , compression and 



friction in rela- 

 tion to, 218 

 ,, pressure cannot 



raise its tempe- 

 rature, 231 

 ,, influence of eccen- 



tricity on, 111 



Antarctic ice, thickness of, proved 

 by icebergs, 211 



, , absolutely free from 



stones or gravel, 

 230 



,, thickness of due to 



difficulty of re- 

 moval, 239 



,, rate of motion of, 



237 



,, cause of motion of, 



240 



,, estimate of area 



covered by, 238 



,, conclusions estab- 



lished regarding, 

 241 

 Antarctic icebergs, peculiar for- 

 mation, 70-73 



,, an important con- 



sequence of, 74 

 Sir Wyville Thom- 

 son on, 203 

 Antarctic ice-cap, section across, 

 243 



,, shallowness of, il- 



lustrated, 243 



,, motion of, due to 



piling up of ice at 

 centre, 234 

 Antarctic ice-sheet, physical con- 

 ditions of, 202 



,, thickness of, not 



limited by pres- 

 sure, 224 



,, annual discharge of 



icebergs from, 238 



,, temperature deter- 



mined mainly by 

 that of its surface, 

 220 



