It is not true that a slight variation among the successive offspring of the same stock goes on increasing until the difference amounts to a specific distinction. On the contrary, it is a matter of fact that extreme variations finally degenerate or become sterile; like monstrosities they die out, or return to their type.


Evolution and Permanence of Type, The Atlantic Monthly, January 1874

Louis Agassiz Quotes

It is not true that a slight variation among the successive offspring of the same stock goes on increasing until the difference amounts to a specific ...

It is not true that a slight variation among the successive offspring of the same stock goes on increasing until the difference amounts to a specific ...

It is not true that a slight variation among the successive offspring of the same stock goes on increasing until the difference amounts to a specific ...

It is not true that a slight variation among the successive offspring of the same stock goes on increasing until the difference amounts to a specific ...