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Notes: Through-Bark Measurement of Grain Direction; Preliminary Results

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A method of estimating spiral grain in the tree stem by using sonic probes inserted a given distance apart and at different angles to the grain direction was studied. Results indicate that the device used, with some modifications, could be valuable in determining the degree of spiral grain in standing trees. Stem damage is minimal, in contrast to destructive sampling methods in use to date.

Keywords: Spiral grain; sound conduction

Document Type: News

Affiliations: Research Forest Products Technologist, Forest Products Laboratory, Forest Service, U S. Dept. of Agric., Madison, Wis.

Publication date: March 1, 1969

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