Havaintoja koivutukkien epäpyöreydestä ja pituusmittaeroista.Observations on the out-of-roundness and deviations from nominal lengths of birch logs
A material of 478 birch logs were measured. The horizontal diameter was on average larger than the vertical one, the difference increasing with the increasing diameter. The reason was supposed to be the effect of sweep and out-of-roundness of logs. The difference between the actual and nominal length increased with the increasing lengths, but decreased with increasing diameter.
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Published in 1980