Report on Forestry ...U.S. Government Printing Office, 1878 |
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abundant acres Agriculture amount annual average bark beech belts birch black walnut box-elder branches cedar cent Champlain Canal chestnut climate cord cottonwood County covered cultivation deciduous diameter district effect European larch evaporation evergreens exposed feet high fence forest forest trees forestry France ground groves growing growth hectare height hemlock hickory inches injury insects Iowa kinds Lake land larch larvæ leaves less lumber maritime pine meters miles moisture mountains Norway spruce nursery observations Osage orange Pinus places plantations planted Platanus poplar prairie present protection Railroad rain rain-fall reboisement region River roots rows Saginaw sand Scotch season seed shade shelter shrub slopes snow soil species spring spruce streams summer surface temperature timber tion Total transplanting trunk valleys valuable vegetation white oak white pine white willow willow winds winter wood woodlands young
熱門章節
第 204 頁 - The general assembly shall enact laws in order to prevent the destruction of, and to keep in good preservation the forests upon the lands of the State, or upon lands of the public domain, the control of which shall be conferred by congress upon the State.
第 292 頁 - These have been kept in constant operation until within about twenty or thirty years, when the supply of water began to fail. The pond owes its existence to a stream which has its source in the hills which stretch some miles to the south. Within the time mentioned, these hills, which...
第 603 頁 - cleft" or "gorge" in the granite peak of the Sierra Nevada Mountains, situated in the county of Mariposa, in the State...
第 418 頁 - The land should be plowed, harrowed and made as mellow as possible during the autumn previous, that the trees may be planted as soon as the ground can be worked in the spring. As soon as the...
第 461 頁 - That in clearing the ground, care be taken to leave one acre of trees for every five acres cleared, especially to preserve oak and mulberries for silk and shipping.
第 309 頁 - The water-courses are dried up, and the irrigating canals empty. The moving sands of the desert being no longer restrained by barriers of forests, are every day gaining upon the land, and will finish by transforming it into a desert as desolate as the solitudes that separate it from Khiva.
第 307 頁 - Government is apt to be so determined that I venture to press upon your lordship my own opinion as to the urgency of active steps being taken in the case of an island so beautiful and at present so fertile as Ceylon. I have lately received an account of the deterioration of the climate of some of the leeward islands, which affords a melancholy confirmation of what I have urged above. " The contrast between neighbouring islands similarly situated is most striking.
第 534 頁 - ARTICLE 9. It shall be the duty of the General Secretary to keep a full and complete record of the proceedings of each regular and special session, to notify members of...
第 336 頁 - Already one great change has occurred that is evident to the most ordinary observer, which is the speedy melting away of the snow on the mountains. It now goes off at once, in a flood, with the first warm weather of spring, whereas formerly, lying shaded and protected by the pines and other evergreen trees, it melted slowly, and all summer sent down to the valleys on both the eastern and western slopes of the Sierras constant and copious streams of water. Instead of a good stage of water in our streams...
第 461 頁 - Certain Conditions or Concessions, Agreed upon by William Penn, Proprietary and Governor of the Province of Pennsylvania and those who are the adventurers and purchasers in the same province the Eleventh of July, one thousand six hundred and eighty-one.