Results of a previous study [cf. F.A. 26 No. 2841] were further analysed for bluntness effects in the light of elastic theory; the estimated force due to bluntness showed a highly significant regression on the square root of edge radius (e.r.); e.r. and chip thickness were more important than wood...

Results from three factories included the following: (1) the improvements in strength and in moisture relations resulting from treatments at 160-180°C. were much greater in boards made from stored than in those from fresh unbarked Spruce slabs; (2) using fresh Spruce slabs of very good quality,...

The degree of damage observed in specimens of imported chipboard exposed to termite attack for 4 years was: 81.18% for untreated specimens; 53.17% for those treated with 1% PCP-NA; 59.85% for those treated with 1% PCP-Cu; and 62.89% for those treated with 2% borax and 3% boric-acid solution. [Cf....

An account of the importance of Sasa Bamboo (including Sasa, Sasamorpha and Neosasamorpha) for forestry in Hokkaido. It is estimated that 70% of the forest undergrowth is composed of Sasa s.l. The larger species (e.g. Sasa kurilensis) provide a raw material for pulp and chipboard, yielding 50-60...

Thickness losses were reported in commercial drying of1/8-in. veneers in Ash-type Eucalypts and Ackaina sp. Behaviour seemed to have much in common with normal collapse, although occurring in the radial direction. Both reconditioning and conditioning cycles resulted in appreciable recovery...

Discusses the use of a transducer (initially produced to investigate marks appearing on drumsanded surfaces normally considered smooth for commercial purposes) to explore the surface profile of rotary-planed Sycamore Maple by measuring the depths of the scallop-shaped markings (a recognized feature ...

Analyses of conifer barks have been made in collaboration with the British Leather Manufacturers' Research Asociation. Moisture-free Japanese Larch bark has on average a tannin content of ca. 17.2% and European Larch bark ca. 12.3 %, both figures being higher than that normally given by Oak bark....

Preliminary tapping trials in Zululand on Pinus elliottii and P. caribaea stems due for clear felling or grown for pulpwood show very promising yields from P. elliottii, and suggest the suitability of this area for a resin-tapping industry because of the favourable terrain and climate, the...

Extractives isolated from N. fusca, a potential pulpwood species, include taxifolin, catechin, aromadendrin, quercetin, kaempferol, naringenin, ellagic and gallic acids, 3, 4', 5-trihydroxystilbene and 3, 3'-dimethoxy ellagic acid. KEYWORDS: Forest products and their utilization \ Nothofagus fusca...

cf. F.A. 26 No. 2841.] Results of an investigation of friction between wood and tool materials indicated that the cause was adhesion between the surfaces, modified by fluid lubrication by wood extractives and water. On graphs showing friction coefficients plotted against sliding speed, the points...