Natural History of Vermont
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In our eReader you can find the full English version of the book. Read Natural History of Vermont 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 Natural History of Vermont
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In comparing specimens of the E. Estor from Con- necticut river with those from Lake Champlain, it has appeared to me that there is a perceptible difference in their general form and aspect, while at the same time they are known to be identical in species. A like gen- eral difference is observable in the E. Reticulatus from different ponds, and also in the brook trout and some 22 other species of fishes ; and this difference is often so marked, that people in the country, who are familiar with ...several localities, profess to be able to designate the locality from which specimens were derived, from the general aspect of the fish. These facts plainly show that very considerable variety may be produced in a species by local circumstances; and since the variation may often be so increased by accidental pecu- liarities in the individuals, which are the progenitors of the species in the new locality, it has appeared to me that naturalists should be more cautious than they seem sometimes to have been, in founding new spe- cies upon variations, which might be supposed to have arisen, in any way, from individual peculiarities, change of habit, or local circumstances, or from all these causes combined.
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To quickly assess the difficulty of the text, read a short excerpt:
In comparing specimens of the E. Estor from Con- necticut river with those from Lake Champlain, it has appeared to me that there is a perceptible difference in their general form and aspect, while at the same time they are known to be identical in species. A like gen- eral difference is observable in the E. Reticulatus from different ponds, and also in the brook trout and some 22 other species of fishes ; and this difference is often so marked, that people in the country, who are familiar with ...several localities, profess to be able to designate the locality from which specimens were derived, from the general aspect of the fish. These facts plainly show that very considerable variety may be produced in a species by local circumstances; and since the variation may often be so increased by accidental pecu- liarities in the individuals, which are the progenitors of the species in the new locality, it has appeared to me that naturalists should be more cautious than they seem sometimes to have been, in founding new spe- cies upon variations, which might be supposed to have arisen, in any way, from individual peculiarities, change of habit, or local circumstances, or from all these causes combined.
What to read after Natural History of Vermont?
You can find similar books in the "Read Also" column, or choose other free books by Zadock Thompson to read onlineMoreLess
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