Proceedings of the American Association for the Advancement of Science 20-21
Proceedings of the American Association for the Advancement of Science 20-21
American Association for the Advancement of Science
The book Proceedings of the American Association for the Advancement of Science 20-21 was written by author American Association for the Advancement of Science Here you can read free online of Proceedings of the American Association for the Advancement of Science 20-21 book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Proceedings of the American Association for the Advancement of Science 20-21 a good or bad book?
What reading level is Proceedings of the American Association for the Advancement of Science 20-21 book?
To quickly assess the difficulty of the text, read a short excerpt:
The point to be remarked is, that many, or even most, of the genera and species which are pe- Digitized by VjOOQIC ADDRESS OF EX-FBESIDSNT GRAY. 11 ouliar to North America as compared with Europe, and largely peculiar to Atlantic North America as compared with the Califor- nian region, are also represented in Japan and Mandchuria, either by identical or by closely similar forms ! The same rule holds on a more northward line, although not so strikingly. If we compare the plants, say of New Engla...nd and Pennsylvania (lat. 45°-47**), with those of Oregon, and th^n with those of North-Eastem Asia, we shall find many of our own furiously repeated in the latter, while only a small number of them can be traced along the route even so far as the western ^lope of the Rocky Mountains. And these repetitions of East American types in Japan and neighboring districts are in all degrees of likeness. Sometimes the one is un- distinguishable from the other ; sometimes there is a difference of aspect, but hardly of tangible character ; sometimes the two would be termed marked varieties if they grew naturally in the same forest or in the same region ; sometimes they are what the botanist calls representative species, the one answering closely to the other, but with some differences regarded as specific ; sometimes the two are merely of the same genus, or not quite that, but of a single or very few species in each country ; when the point which interests us is, that this peculiar limited type should occur in two antipodal places, and nowhere else.
User Reviews: