Possible use of Euclid`s second theorem to determine the growth ring characteristics

Transverse section of Sitka spruce was analysed according to the Euclid`s second theorem (EST) in order to determine whether EST could be used for establishing wood growth ring characteristics. The results were adjusted so as to provide comparability between radial width of earlywood (E) and latewood (L) throughout the whole annual ring of the experimental sample. It was observed that, although the EST gives only the approximate mean for E and L, the calculation of the mean radial width of E and L was reliable and confirmed by video scanning method. When considering its integrity, this method could only be used effectively, if the growth rings have the same pattern and show the rarefied variations.