To what uses is coal applied?
(The coal was deposited thousands of years ago, and has served no useful purpose, that we know of, till very recently. Its formation was planned and completed to meet a want which was not to be felt till the lapse of many ages. It is a notable instance of the wisdom and forethought, as well as of the benevolence, of God.) In what does this prospective arrangement consist? What are the character and position of the fossils of the coal measures?
Fig. 23.  | Fig. 25.  |
Fig. 24.  |
Fig. 26.
What are the four most abundant forms?
Describe the Stigmaria. The Sigillaria. The Lepidodendron. The Calamite.
Where are the beds of coal found?
What is the fourth formation of rocks?