Scientific American Supplement, No. 711, August 17, 1889
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To quickly assess the difficulty of the text, read a short excerpt:
Ifound European mountain ash trees last summer in a forest in NewHampshire; the seed must have been carried over two miles as the crowflies.
While this alternation is going on in the East, and may have beengoing on for thousands of years, the Rocky Mountain district is not sofortunate. When a forest is burned down in that dry region, it isdoubtful if coniferous trees will ever grow again, except in somelocalities specially favored. I have seen localities where short-livedtrees were dying out an...d no others taking their places. Such spotswill hereafter take their places above the timber line, which seems tome to be a line governed by circumstances more than by altitude orquality of soil.
There are a few exceptions where pines will succeed pines in aburned-down forest. _Pinus Murrayana_ grows up near the timber line inthe Rocky Mountains. This tree has persistent cones which adhere tothe trees for many years. I have counted the cones of sixteen years onone of these trees, and examined burned forests of this species, wheremany of the cones had apparently been bedded in the earth as the treesfell.
What to read after Scientific American Supplement, No. 711, August 17, 1889?
You can find similar books in the "Read Also" column, or choose other free books by Various to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Ifound European mountain ash trees last summer in a forest in NewHampshire; the seed must have been carried over two miles as the crowflies.
While this alternation is going on in the East, and may have beengoing on for thousands of years, the Rocky Mountain district is not sofortunate. When a forest is burned down in that dry region, it isdoubtful if coniferous trees will ever grow again, except in somelocalities specially favored. I have seen localities where short-livedtrees were dying out an...d no others taking their places. Such spotswill hereafter take their places above the timber line, which seems tome to be a line governed by circumstances more than by altitude orquality of soil.
There are a few exceptions where pines will succeed pines in aburned-down forest. _Pinus Murrayana_ grows up near the timber line inthe Rocky Mountains. This tree has persistent cones which adhere tothe trees for many years. I have counted the cones of sixteen years onone of these trees, and examined burned forests of this species, wheremany of the cones had apparently been bedded in the earth as the treesfell.
What to read after Scientific American Supplement, No. 711, August 17, 1889?
You can find similar books in the "Read Also" column, or choose other free books by Various to read onlineMoreLess
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