What May be Learned from a TreeD. Appleton & Company, 1863 - 192 páginas |
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Términos y frases comunes
amongst amount animal annual appearance atmosphere axilla axis or stem beautiful become beech bipinnate Botany bracts branchlets bud-scales bud-traces called calyx cambium carbonic acid commencement common condition cone conical constructed continue Coultas creation Draba verna earth entire tree epidermis fact feet fibre fibre-cells fibrous floral flowers foliage forest formation gemmule gradually green grow Hence hundred inches individual labors lamina landscape laws layers leaf leaf-surface leaflets living lobes main axis marked matter medullary rays metamorphosed midrib Nature Norway Spruce number of leaves nursing-leaves organization parenchyma peculiar period petals petiole phytons pistils pith portion present primary axis produced ramifications reader regarded rocks season secondary axes seed sepals sets of bud-rings shoots and branches side-shoot soil spring stage stamens stem and branches storms summit surface terminal bud tion tissue tree tripinnate twigs variety vegetative vegetative powers wave of growth whilst whole tree winter wood and bark wood-rings year's shoot
Pasajes populares
Página 133 - Nature never did betray The heart that loved her; 'tis her privilege Through all the years of this our life, to lead From joy to joy: for she can so inform The mind that is within us, so impress With quietness and beauty, and so feed With lofty thoughts, that neither evil tongues, Rash judgments, nor the sneers of selfish men, Nor greetings where no kindness is, nor all The dreary intercourse of daily life, Shall e'er prevail against us, or disturb Our cheerful faith that all which we behold Is full...
Página 132 - The Author of nature has not given laws to the universe, which, like the institutions of men, carry in themselves the elements of their own destruction. He has not permitted, in his works, any symptom of infancy or of old age, or any sign by which we may estimate either their future or their past duration. He may put an end, as he no doubt gave a beginning, to the present system, at some determinate period...
Página 34 - Thus, the Washington Elm at Cambridge — a tree of no extraordinary size — was some years ago estimated to produce a crop of seven millions of leaves, exposing a surface of 200,000 square feet, or about five acres, of foliage.
Página 161 - ... less consequence — in fact it is far better to cut them down ; for they make the climate too moist and cold, and prevent the successful cultivation of the soil. The present agricultural condition of Finland, in Northern Russia, establishes this fact ; for the removal of its woods has dried up its swamps and forwarded cultivation, whilst it has rendered the climate milder and more habitable. So in laying the railroad across the Isthmus of Panama, the country was found to be unhealthy because...
Página 164 - Pine-trees, and so brought the overflow of the sea-sand to a stand still. By reference to the map of Prussia, it will be seen that there is situated in eastern Prussia, between latitude 54° 15...
Página 48 - ... four years. These investigations and others lead irresistibly to the conclusion, that the breadth of the wood-rings is determined not only by the activity of the leaves of the terminal shoot of the main stem, but that the leaves of the side-shoots or of the whole system of shoots cooperate ; and therefore that the leafage of each season forms a common source, whence is derived not only the nutriment forming the new layer or covering of each individual branch or system of shoots...
Página 130 - ... and, after a while flocks of green matter collect on the sides of the vessel in which it is contained. On these flocks, whenever the sun is shining, bubbles of gas may be seen, which, if collected, prove to be a mixture of oxygen and nitrogen, the proportion of the two being variable.
Página 40 - If I have done the public any service, it is due to nothing but industry and patient thought.
Página 45 - ... which lose their conical figure or outline considered collectively, and, spreading out on all sides, form a dome-shaped or hemispherical top or crown. This is particularly grand in the horsechestnut, the lime-tree, and the elm, which...
Página 164 - Prussia, between latitude 54° 15' and 54° 45' North, and longitude 19° 15' and 20° 25' East, an extensive lagoon, called the Frische-Haff, or Fresh Gulf, which is separated from the Baltic by the FrischeNehrung, or Fresh Beach, a tongue of land thirty-eight miles in length by one in breadth, the northeast extremity of which communicates with the Baltic by a channel half a mile across. The low shores along this line of coast are washed by the waters of the Gulf of Dantzig, and in the middle ages...