Many years ago it was taught that plants and animals were composed of different materials: plants, of a chemical substance of three elements,- carbon….

This view, as a rounded whole and in all its essential elements, has very recently disappeared from science. It died a royal death with Agassiz..

The former conviction that these two kingdoms were wholly different in structure, in function, and in kind of life, was not seriously disturbed by th….

I am sufficiently convinced already that the members of a profession know their own calling better than anyone else can know it..

Agassiz, when I saw him last, had read but a part of Origin of Species. He says it is POOR-VERY POOR!!. The fact is, he is very much annoyed by it..

It was always understood that plants and animals, though completely contrasted in their higher representatives, approached each other very closely in….

Indeed upon much that may have to say, I expect rather the charitable judgment than the full assent of those whose approbation I could most wish to w….

I accept extinction as best explaining disjoined species. I see that the same cause must have reduced many species of great range to small, and that ….

We have really, that I know of, no philosophical basis for high and low. Moreover, the vegetable kingdom does not culminate, as the animal kingdom do….

Your candor is worth everything to your cause. It is refreshing to find a person with a new theory who frankly confesses that he finds difficulties, ….

This substance, which is manifold in its forms and protean in its transformations, has, in its state of living matter, one physiological name which h….

It was implicitly supposed that every living thing was distinctively plant or animal; that there were real and profound differences between the two, ….

Faith in order, which is the basis of science, cannot reasonably be separated from faith in an Ordainer, which is the basis of religion..

We have spoken of beings so low in the scale that the individuals throughout their whole existence are not sufficiently specialized to be distinctive….

Next it was found that it was physiologically and structurally the same in the plant, that it was the living part of the plant, that which manifested….

Yes, it is true that there are times when you do wonder if things are worth it but usually those moments pass as soon as they have come..

Natural selection is not the wind which propels the vessel, but the rudder which, by friction, now on this side and now on that, shapes the course..

The best opinion now is, that there are multitudinous forms which are not sufficiently differentiated to be distinctively either plant or animal, whi….

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

We may take it to be the accepted idea that the Mosaic books were not handed down to us for our instruction in scientific knowledge, and that it is o….

It remains to consider what attitude thoughtful men and Christian believers should take respecting them, and how they stand related to beliefs of ano….