FREE BOOKS

Author's List




PREV.   NEXT  
|<   22   23   24   25   26   27   28   29   30   31   32   33   34   35   36   37   38   39   40   41   42   43   44   45   46  
47   48   49   50   51   52   53   54   55   56   57   58   59   60   61   62   63   64   65   66   67   68   69   70   71   >>   >|  
er continent, for, with peaks nineteen thousand feet above sea-level, its mountainous topography is remarkable. Along the coast of Victoria Land, in the Australian Quadrant, are some of the most majestic vistas of alpine scenery that the world affords. Rock exposures are rare, ice appearing everywhere except in the most favoured places. Regarding plant and animal life upon the land there is little to say. The vegetable kingdom is represented by plants of low organization such as mosses, lichens, diatoms and algae. The animal world, so far as true land-forms are concerned, is limited to types like the protozoa (lowest in the organic scale), rotifera and minute insect-like mites which lurk hidden away amongst the tufts of moss or on the under side of loose stones. Bacteria, most fundamental of all, at the basis, so to speak, of animal and vegetable life, have a manifold distribution. It is a very different matter when we turn to the life of the neighbouring seas, for that vies in abundance with the warmer waters of lower latitudes. There are innumerable seals, many sea-birds and millions of penguins. As all these breed on Antarctic shores, the coastal margin of the continent is not so desolate. In view of the fact that life, including land-mammals, is abundant in the North Polar regions, it may be asked why analogous forms are not better represented in corresponding southern latitudes. Without going too deeply into the question, it may be briefly stated, firstly, that a more widespread glaciation than at present prevails invested the great southern continent and its environing seas, within recent geological times, effectually exterminating any pre-existing land life. Secondly, since that period the continent has been isolated by a wide belt of ocean from other lands, from which restocking might have taken place after the manner of the North Polar regions. Finally, climatic conditions in the Antarctic are, latitude for latitude, much more severe than in the Arctic. With regard to climate in general, Antarctica has the lowest mean temperature and the highest wind-velocity of any land existing. This naturally follows from the fact that it is a lofty expanse of ice-clad land circumscribing the Pole, and that the Antarctic summer occurs when the earth is farther from the sun than is the case during the Arctic summer. There are those who would impatiently ask, "What is the use of it all?" The answer is brief. [TEXT
PREV.   NEXT  
|<   22   23   24   25   26   27   28   29   30   31   32   33   34   35   36   37   38   39   40   41   42   43   44   45   46  
47   48   49   50   51   52   53   54   55   56   57   58   59   60   61   62   63   64   65   66   67   68   69   70   71   >>   >|  



Top keywords:

continent

 

Antarctic

 

animal

 
represented
 

latitude

 
vegetable
 

existing

 

lowest

 
latitudes
 
Arctic

summer

 

regions

 
southern
 
answer
 
exterminating
 

environing

 

abundant

 

geological

 

invested

 
recent

effectually

 
mammals
 

present

 

briefly

 

stated

 

Without

 
question
 
deeply
 

firstly

 

prevails


glaciation

 

widespread

 

analogous

 

highest

 

velocity

 

naturally

 

temperature

 
impatiently
 

climate

 

general


Antarctica
 

occurs

 
farther
 
expanse
 
circumscribing
 

regard

 

restocking

 
period
 
isolated
 

conditions