The different degrees of entireness in which, the geologist finds his organic remains depend much less on their age than on the nature of the rock in which they occur...


The Old Red Sandstone, Chapter IX (p. 151), John B. Alden, Publisher. 1892


The different degrees of entireness in which, the geologist finds his organic remains depend much less on their age than on the nature of the rock in ...

The different degrees of entireness in which, the geologist finds his organic remains depend much less on their age than on the nature of the rock in ...

The different degrees of entireness in which, the geologist finds his organic remains depend much less on their age than on the nature of the rock in ...

The different degrees of entireness in which, the geologist finds his organic remains depend much less on their age than on the nature of the rock in ...