Utilisation en papeterie du bois de trois conifères américains cultivés dans l'est de la France (épicéa de Sitka, sapin de Vancouver, sapin de Douglas). - I. Considérations forestières - II. Essais sur la valeur papetière effectués à l'école française de papeterie (Université de Grenoble)

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英语. USE IN PAPER MAKING OF THE WOODOF THREE AMERICAN CONIFEROUSCULTIVATED IN THE EAST OF THE FRANCE(Sitka spruce, Vancouver fir, Douglas fir) - SUMMARY - The question arises in France to produce in sufficient quantitywood to the fabrication of wood pulp. In this aim, peoplelook at the creation of artificial crops with quick growing coniferousspecies. Amongst them there are three species indigenousto the North America wich call to a special attention : Sitkaspruce (Picea sitchensis), Vancouver fir (Abies grandis) andDouglas fir (Pseudo tsuga Douglasii).Tests have been undertook by the « École des Eaux et Forêts» since thirthy five years in the domesnial forest of Amance,near Nancy on several foreign species and specially on thesequoted above. Sample plots of twenty five " ares " have beenestablished in a deep clayey soil, under the climate of continentaltype with scharp winter and rather dry and warmsummer which characterizes the East of the France. Theobtained results have been favourable. The three speciesproved a good success, the growth was quick and the yeld considerable.To estimate the behalf of the wood of these species, cultivatedand at a not very old age cutted in that way, according to thefabrication of paper, tests have been carried out at the " ÉcoleFrançaise de Papeterie " depending on the Université deGrenoble " with samples coming from trees cut in the plantationof the Amance Forest. Tests were carried out according tothe fabrication of soda and sulphite pulp.The conclusion of the tests is the wood of american speciescultivated in the Amance Forest and used between 20 and30 years old have been revealed suitable to make paper as wellthe wood of these species grown in America.