For beech bark (Fagus sylvatica), specific gravity was measured by means of pycnometer and by water immersion. The pycnometer was suitable for measurement of all analysed sample types. Water immersion method could only be applied to beech wood, whole and inner beech bark. Specific gravities of whole beech bark (0.58 ± 0.04), inner beech bark (0.57 ± 0.05) and outer beech bark (0.75 ± 0.06) differed significantly.

中文翻译：

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内外山毛榉树皮的比重

对于山毛榉树皮（Fagus sylvatica），通过比重瓶和水浸法测量比重。比重瓶适用于所有分析样品类型的测量。浸水法仅适用于山毛榉木，整个和内部山毛榉树皮。整个山毛榉树皮（0.58±0.04），内部山毛榉树皮（0.57±0.05）和外部山毛榉树皮（0.75±0.06）的比重有显着差异。