Forest Resources of Chile as a Basis for Industrial ExpansionForest Service, U.S. Department of Agriculture, 1946 - 256 páginas |
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Términos y frases comunes
50 percent adequate Alamo Alerce Araucaria Arauco Average stump height Bio-Bio board foot breast height Canelo charcoal Chile Chilean Chiloe Cipres Coigue conifers construction consumption Coquimbo cost creosote cubic volume depletion diameter at breast equals tree diameter equipment estimated Eucalyptus forest industries forest land forest products forest resource fuel furniture grade growth hardwood hauling hectares height equals tree Height in 16.3-foot inches Insignis Pine kiln Lingue Llanquihue Luma lumber Magallanes Malleco Manio manufacture material meters mill operations million board feet million cubic feet natural forest Nothofagus Olivillo panels percent of d.b.h. pesos pile plant plantations Plate plywood poles present Province Group Puerto Montt pulp Rauli reasonable Roble Santiago sawmill sawtimber shingles small mill solid wood species stump height equals supply Talca Talcahuano Tepa thickness timber Tineo tion Ulmo United utilization Valdivia veneer Volume Table Volumes shown wood volume woodland zone
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Página 238 - Truckloads of green stock are periodically fed into the kiln and truckloads of dried stock removed at the same time from the other end of the line. The stock thus moves progressively through the kiln until it emerges, supposedly dry, after a specified time of exposure to the various conditions along the length of the kiln. The temperature and...
Página 238 - The temperature and relative humidity at any point are intended to remain constant, but the kiln is hotter and drier at the dry end than at the green end. The compartment kiln is loaded fully at one time, the entire charge remaining in place throughout the drying period. The temperature and relative humidity are as nearly uniform as possible throughout the kiln at any given time.
Página 238 - ... kiln. In the compartment class, on the other hand, the kiln is loaded fully at one time, the entire charge remaining in place throughout the drying period. Again, in the progressive kiln, the temperature and humidity at any...
Página 138 - A— annual charge; P— amount of Initial Investment; n- number of years In recurring period; r— rate of interest expressed decimally (in this case taken as 5 per can.).
Página 240 - ... appearance. Although the various presses differ greatly in the details of their construction, most of them work on the cylinder-and-plunger principle, the plunger being driven by means of crank and connecting rod or by some toggle-joint system of levers so designed that it is capable of exerting a very great pressure at the end of the stroke. Practically all of them also are automatically fed. In systems in which binders such as pitch are used and in those in which the resins of the wood serve...
Página 237 - ... own field of usefulness. Progressive kilns are sometimes called " tunnel " kilns. The essential differences between these and the compartment kilns arise from the methods of handling the stock through them. In the progressive kiln, a number of truck loads of timber extending through the kiln in an unbroken line and all in different stages of drying make up the total charge. Comparatively small truck loads of material are periodically fed in at the " green " or loading end, each load in turn being...
Página 166 - Full use of the forest resource is reasonably attainable if the proper management, skill and business acumen can be applied. However, if future forest industries are to be sustained on a permanent basis, Chile must develop and execute a forest policy of broad scope. A good start has already been made in the basic forest law of June, 1931, and subsequent forest legislation. This should be broadened and adequately implemented to provide for (1) adequate forest protection, particularly from fire, and...
Página 240 - ... wood should be considered entitled to a reasonable profit on the costs of his operation. Some of the " war fuel companies " which were formed during the fuel crisis in the winter of 1917-18 limited their profits to 6 per cent. Municipal yards as a rule sell at cost. MANUFACTURE OF SAWDUST BRIQUETS.1 Practically all of the European machines use some kind of binder mixed with the sawdust, or rely upon the resinous material in the wood to hold the briquet together, but American and Canadian inventors...
Página 240 - Hu. 15, 1016. 10 per cent. These briquets are hard and firm and resemble coal briquets in general appearance. Although the various presses differ greatly in the details of their construction, most of them work on the cylinder-and-plunger principle, the plunger being driven by means of crank and connecting rod or by some toggle-joint system of levers so designed that it is capable of exerting a very great pressure at the end of the stroke. Practically all of them also are automatically fed. In systems...
Página xiv - ... is: (1) To make an inventory of the extent and condition of forest lands and of the present supply of timber and other forest products on these lands; (2) to ascertain the rate at which this supply is being increased through growth, and the potential growth on forest areas; (3) to determine the extent of depletion of the forests through cutting and through loss from fire, insects, disease, windthrow, and other causes; (4) to determine the present consumption and the probable future trend in requirements...