Abstract
In 1936, one of us (ONAKA) reported beforehand that the enzymatically-produced cavities appeared occasionally in the secondary walls of tracheids of coniferous wood-fragments taken from the ancient tombs or remains, and that the cavities disposed parallel to the micellar arrangement. Now we have made studies of the micellar arrangement of “Ichii”-(Taxus cuspidata S. et Z.), Hinoki-(Chamaecyparis obtusa S. et Z.), “Koyamaki” (Sciadopitys verticillata S. et Z.) and “Konotegashiwa”- (Thuja orientalis Carr.) woods of the same kinds.
The results obtained are as follows:
1. Micells in the secondary walls of a coniferous tracheid arrange nearly at a certain angle to the axis of the cell forming a single spiral around it. But thir arrangement do not pass over the pits.
2. Concerning one tracheid, the inclination of the micellar arrangement to the cell axis is rather less at the both ends of it than at the center, and the matter is same on tangential wall where the diameter of tracheids is smaller because of contact with the ray.
3. In springwood, the inclination of the micellar arrangement on tangetial walls is rather less than on radial, but in summerwood it is contrary.
4. Though th e inclination of the micellar arrangement in summerwood is generally rather les than in springwood, the difference is not so evident on tangential as on radial walls.
5. On radial walls the diameter of tracheids become naturally small towards summerwood from spring-one and the inclination of the micellar arrangement has also similar tendency. And the correlation of both is positive and high. But on tangential' walls it is not so evident.
