This article deals with the anatomic structure of coniferous wood and, as a consequence, the influence of such wood on the possibility of distributing the preservative solutions into the wood.
It is noticed that the wall cell apertures, called pits, play the leading role here, for they, on a certain humidity of coniferous wood, completely or partly aspirate.
Aspirated pits originate by saturation of the grain of coniferous wood, and the pits of spruce and fir become completely aspirated, making it quite difficult to convey preservative solutions in these species when in a dry state, regardless of the amount and duration of pressure.
