. Canadian forestry journal. Forests and forestry -- Canada Periodicals. This is what is called a "spiral grain" spruce log. Because the tree grew with this defect, all such logs were discarded for aeroplane manuf ictur? and indeed for nearly any other timber purpo r-. supply will have to be secured from the ordinary annual cut. If it had been necessary to continue the pro- duction in British Columbia at the rate attained by the end of 191S. through the concentration of efforts, the available supply of aeroplane spruce that could be secured at a reasonable cost would have been ex- ha
. Canadian forestry journal. Forests and forestry -- Canada Periodicals. This is what is called a "spiral grain" spruce log. Because the tree grew with this defect, all such logs were discarded for aeroplane manuf ictur? and indeed for nearly any other timber purpo r-. supply will have to be secured from the ordinary annual cut. If it had been necessary to continue the pro- duction in British Columbia at the rate attained by the end of 191S. through the concentration of efforts, the available supply of aeroplane spruce that could be secured at a reasonable cost would have been ex- hausted in a year or so. 'Hie United States Spruce Produc- titiu Corporation opened a consid r- al)1c source of supply by railway con- INTER-PLANE STRUT. SECTION OF WING BEAM CHANNELLED OUT TO REDUCE WEIGHT. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Canadian Forestry Association. [Ottawa] : Canadian Forestry Association
Size: 3222px × 776px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcanadianforestryassociation, bookcolle, booksponsormsn
