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Density and shrinkage of old wood

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Summary

Density and shrinkage were measured in samples of old wood preserved in a glacier, burial grounds, house settlements, harbour installations and ships sunk in the sea. Time of exposure ranged from about 300 to 100,000 years. Density was found reduced in most cases and shrinkage increased. In oak, density was reduced up to 0.13 gr/cm3 (at 12% m.c.) and a tangential shrinkage value of 62.16% was measured. Irrespective of time of exposure and loss of material, old wood retains its gross structural characteristics as long as it remains waterlogged.

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Authors and Affiliations

  1. Department of Forestry, School of Agriculture and Forestry, Aristotelian University, Thessaloniki, Greece

    K. Borgin (Visting Professor), G. Tsoumis & C. Passialis

  2. Dept. of Chemistry, University of Nairobi, Kenya

    K. Borgin (Visting Professor)

Authors
  1. K. Borgin
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  2. G. Tsoumis
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  3. C. Passialis
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Additional information

We would like to thank the Director of the Norwegian Nautical Museum at Bygdoy near Oslo, Mr. Svein Molaug, and Mr. Thomas Seip Bartholin of Kvartarbiologisk Laboratorium, Lunds Universitet in Sweden for valuable assistance and samples for this research project.

We would also like to express our appreciation to Miss K. Corbett for assistance in photography and freeze-microtomy.

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Borgin, K., Tsoumis, G. & Passialis, C. Density and shrinkage of old wood. Wood Sci. Technol. 13, 49–57 (1979). https://doi.org/10.1007/BF00350175

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