COAL. 
470 
several times renewed in the same place, and nearly 
under the same circumstances. 
4. That the cause, whatever it may be, is nearly 
the same over all the earth ; since the beds of coal 
always exhibit nearly the same phenomena in their 
structure and accidental circumstances. 
5. That these beds have not been deposited by 
any violent revolution ; but, on the contrary, in the 
most tranquil manner ; since the organized bodies 
that are found in them are often entire, and the 
leaves of vegetables impressed in the slate which 
covers the coals are hardly ever bruised, or other- 
wise deranged. 
