Proceedings of the American Association for the Advancement of Science 20-21
Proceedings of the American Association for the Advancement of Science 20-21
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In our eReader you can find the full English version of the book. Read Proceedings of the American Association for the Advancement of Science 20-21 Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Proceedings of the American Association for the Advancement of Science 20-21
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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.
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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.
What to read after Proceedings of the American Association for the Advancement of Science 20-21?
You can find similar books in the "Read Also" column, or choose other free books by American Association for the Advancement of Science to read onlineMoreLess
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