Did man, after his first inroad into South America, destroy, as has been suggested, the unwieldy Megatherium and the other Edentata?

The natural history of this archipelago is very remarkable; it seems to be a little world within itself.

Englishmen rarely cry, except under the pressure of the acutest grief; whereas in some parts of the Continent the men shed tears much more readily and freely.

How odd it is that anyone should not see that all observation must be for or against some view if it is to be of any service!

A luminous body will appear more brilliant in proportion as it is surrounded by deeper shadow.

Light is the chaser away of darkness. Shade is the obstruction of light. Primary light is that which falls on objects and causes light and shade. And derived lights are those portions of a body which are illuminated by the primary light. A primary shadow is that side of a body on which the light cannot fall.