The former conviction that these two kingdoms were wholly different in structure, in function, and in kind of life, was not seriously disturbed by the difficulties which the naturalist encountered when he undertook to define them.

Quote by Asa Gray

Topics: Asa Gray Quotes

But it was soon ascertained that this quaternary matter of the animal body was chemically...

But it was soon ascertained that this quaternary matter of the animal body was chemically...

Is it philosophical, is it quite allowable, to assume without evidence from fossil plants that...

Is it philosophical, is it quite allowable, to assume without evidence from fossil plants that...

I proceed with the proper subject of this discourse; namely, the further changes in scientific...

I proceed with the proper subject of this discourse; namely, the further changes in scientific...

Your candor is worth everything to your cause. It is refreshing to find a person...

Your candor is worth everything to your cause. It is refreshing to find a person...

Many years ago it was taught that plants and animals were composed of different materials:...

Many years ago it was taught that plants and animals were composed of different materials:...

Next it was found that it was physiologically and structurally the same in the plant,...

Next it was found that it was physiologically and structurally the same in the plant,...

This substance, which is manifold in its forms and protean in its transformations, has, in...

This substance, which is manifold in its forms and protean in its transformations, has, in...

It was always understood that plants and animals, though completely contrasted in their higher representatives,...

It was always understood that plants and animals, though completely contrasted in their higher representatives,...

In short, the animal and vegetable lines, diverging widely above, join below in a loop.

In short, the animal and vegetable lines, diverging widely above, join below in a loop.

I accept extinction as best explaining disjoined species. I see that the same cause must...

I accept extinction as best explaining disjoined species. I see that the same cause must...

Why is it not just as likely that there were as many small general nearly...

Why is it not just as likely that there were as many small general nearly...

Indeed upon much that may have to say, I expect rather the charitable judgment than...

Indeed upon much that may have to say, I expect rather the charitable judgment than...

It was implicitly supposed that every living thing was distinctively plant or animal; that there...

It was implicitly supposed that every living thing was distinctively plant or animal; that there...

I know some people who never have any difficulties to speak of. The moment I...

I know some people who never have any difficulties to speak of. The moment I...

We may take it to be the accepted idea that the Mosaic books were not...

We may take it to be the accepted idea that the Mosaic books were not...

The best opinion now is, that there are multitudinous forms which are not sufficiently differentiated...

The best opinion now is, that there are multitudinous forms which are not sufficiently differentiated...

It remains to consider what attitude thoughtful men and Christian believers should take respecting them,...

It remains to consider what attitude thoughtful men and Christian believers should take respecting them,...

I take it for granted that you do not wish to hear an echo from...

I take it for granted that you do not wish to hear an echo from...

We have spoken of beings so low in the scale that the individuals throughout their...

We have spoken of beings so low in the scale that the individuals throughout their...

I am sufficiently convinced already that the members of a profession know their own calling...

I am sufficiently convinced already that the members of a profession know their own calling...