150 THE OLD RED SANDSTONE. 
climate —a greenhouse equalization of heat, if I may so 
speak ; and hence, too, it would seem, a widely spread Fauna 
and Flora. The greenhouses of Scotland and Sweden pro- 
duce the same plants with the greenhouses of Spain and 
Italy ; and when the world was one vast greenhouse, heated 
from below, the same families of plants, and the same tribes 
of animals, seem to have ranged over spaces immensely 
more extended than those geographical circles in which, in 
the present time, the same plants are found indigenous, and 
the same animals native. The fossil! remains of the true 
Coal Measures are the same to the westward of the Alleghany 
Mountains as in New Holland, India, Southern Africa, the 
neighborhood of Newcastle, and the vicinity of Edinburgh. 
And I entertain little doubt that, on a similar principle, the still 
more ancient organisms of the Old Red Sandstone will be 
fcund to bear the same character all over the world. 
