The Indian Forester, Volumen33R.P. Sharma, 1907 |
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Términos y frases comunes
acres afforestation agricultural amount annual appears Assam average bamboos Bengal Bombay Brandis Burma cent Central Provinces Conservator of Forests considerable Coopers Hill coppice course crop cultivation Dehra Dun dhowra Dietrich Brandis district Division experiments exploitation fact favour feet fire conservancy fire-protection flowers Forest Department Forest Officers Forest Service forestry germinate girth Government of India grass grazing ground growing growth Hardwickia important improvement fellings inches increase Indian Forest Service Indian Forester insects interest lakhs land Madras matter mature ment method obtained outturn paper phalange plantations plants poles possible practical present produce protection pulp question rainfall reason reproduction reserves revenue rifles rubber scientific seed seedlings sholagas shows soil sowing species square miles supply sylvicultural taken taungya teak teak forests Tharrawaddy timber tion trees weeds whilst wood wood pulp working-plans yield young
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Página 235 - I have found it so — than constantly to bear this conclusion in mind. Yet unless it be thoroughly engrained in the mind, I am convinced that the whole economy of nature, with every fact on distribution, rarity, abundance, extinction, and variation, will be dimly seen or quite misunderstood. We behold the face of nature bright with gladness, we often see superabundance of food; we do not see, or we forget, that the birds which are idly singing round us mostly live on insects or seeds, and are thus...
Página 218 - I have the honour to address you on the subject of the Statement of Policy (Cmd.
Página 369 - In looking at Nature it is most necessary to keep the foregoing considerations always in mind — never to forget that every single organic being may be said to be striving to the utmost to increase in numbers, that each lives by a struggle at some period of its life, that heavy destruction inevitably falls either on the young or old during each generation or at recurrent intervals. Lighten any check, mitigate the destruction ever so little, and the number of the species will almost instantaneously...
Página 486 - Large timbers require years of drying before the moisture is reduced to the point where strength begins to increase. It must also be taken into consideration that more or less checking always occurs when large timbers dry; and if this checking is excessive it may cause weakness to counterbalance, partially or entirely, the strength gained in drying. Consequently it is not safe to assume that the average strength of large, so-called seasoned timbers is much greater than that of green or wet ones....
Página 406 - For, by science, I understand all knowledge which rests upon evidence and reasoning of a like character to that which claims our assent to ordinary scientific propositions. And if any one is able to make good the assertion that his theology rests upon valid evidence and sound reasoning, then it appears to me that such theology will take its place as a part of science.
Página 486 - The increased strength given to green wood by thoroughly drying it is so great that It will surprise many. For example, the strength of a piece of unseasoned red spruce may be Increased over 400 per cent by a thorough drying at the temperature of boiling water. Strength decreases again, however. as the wood reabsorbs moisture...
Página 486 - Forest Service has been making a thorough study of it during the past three years and is about to publish the results of its investigation in an exhaustive technical bulletin entitled, " Effect of Moisture upon the Strength and Stiffness of Wood." The chief points presented by the study are: 1. The relation of moisture to strength follows a definite law which can be graphically expressed. Proper drying very greatly increases the strength of all kinds of wood, the amount of increase in strength depending...
Página 533 - Some of these did excellent service, and they gave tone to the new Department. In 1866, while on sick leave in England, he obtained the sanction of the late Marquis of Salisbury, the Secretary of State for India, to educate young Englishmen in Continental forest schools, partly in France and partly in Germany. Under this system of training which lasted until 1886, a number of distinguished Forest Officers were supplied to India. About the...
Página 46 - Nepa"! hills, where trees grow to between 100 and 150 feet high, with a clear stem of 60 to 80 feet and a girth of 20 to 25 feet.
Página 487 - ... of a number of species has been determined. This point, which varies with conditions and species of wood, designates the percentage of water which will saturate the fibers of the wood. It has been found that, under normal conditions, wood fiber will absorb a definite amount of moisture; beyond this the water simply fills the pores of the wood like honey in honey-comb. Only that water which permeates the wood fiber has an influence upon the strength. For the following species, the saturation point...