Ch. XLVI.l 



IMBEDDING OF OEGANIC EEMAINS. 



525 



agents of change are 



confined to another element — to that 



larger portion of the globe, from which, by our very 

 sation, we are almost entirely excluded.^ 



organi- 



IMBEDDING OP TEREESTEIAL PLANTS. 



^ ^^POJlTj, 



'*»!, 



Hi;, 



Uk 







Borium- 



imbeddi 



in? 



Liid,Isiia]] 

 odtB foraed 



our subject 



lOUS 



le 



oe" 



modes 



bnried in 



wherel)J 

 tombed J 



Ted in »^^ 



fuller 



iW^ 



: . the ^^f^ 

 I are ^^r^ 



:l5 



fit 



Illf^ 



e^ 



deefJ) 



J file 



rprurf 



r 



When a tree falls into a river from the nndermining 



om 



on the snrface, not because the woody portion is specifically 

 lighter than water, but because it is full of pores containing 

 air. When soaked for a considerable time, the water makes 

 its way into these pores, and the wood becomes water-logged 



required for this process varies in 

 3veral kinds may be drifted to great 



and sinks. 



time 



sometimes 



buoyancy. 



It wood be sunk to vast depths m the sea, it may be im- 

 pregnated with water suddenly. Captain Scoresby informs 

 us, in his Account of the Arctic Regions, that on one occa- 

 sion a whale, on being harpooned, ran out all the line in the 

 boat, which it then dragged under water, to the depth of 

 several thousand feet, the men having just time to escape to 



the fish returned to the surface ^ to 



a piece of ice. When 



time 



moment 



sink — an unusual cir- 



cumstance, which was found to be caused by the weight of 



the sunken boat, which 



remained attached to it. By 



means of harpoons and ropes 



from 



from 



a rope to the lines of the attached boat, which was no sooner 

 done than the fish rose again to the surface. The sunken 

 boat was then hauled up with great labour 5 for so heavy was 

 it, that although before the accident it Avould have been 

 buoyant when full of water, yet it now required a boat at 



irom 



came 



When 



the planks, which were of wainscot, were as 



com 



bottom 



* See above, Vol. I. p. 99. 



