It has been already examined in our previous experiments that by using the sewing thread for controlling stitch balance, the stitch structure can be represented by the length of the threads consumed to make the seam. This study has investigated the relation between stitch structure and tensile strength applied parallel to the seam direction. In the experiments, the breakage of a sewing thread is assumed to be the seam breakage. The results are as follows
1. Even if the thread tension of a stitch balancing was held constant, the length of the threads consumed was still always variable. The variance of thread length on static thread tension for balanced seams was greater than that for unbalanced seams.
2. Both tensile strength and elongation at seam breakage have varried under any condition adjusted by the stitch balancing thread tension. The variance of the tensile strength and breaking elongation in balanced tension was greater than that in unbalanced tension. In other words, even if we adjust wewing machine for balanced seam, as a matter of fact, the seam structure will always be variable.
3. A close correlation was found between the difference in length of needle and bobbin threads and the tensile strength in seam breakages.
Therefore, it might be insisted, based on this investigation, that the stitch structure can be represented quite accurately by the difference in length between the needle and bobbin threads consumed in sewing rather than by the stitch balancing thread tension.

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A questionnaire survey has been made of 600 women living in Nara city ranging in age from 18 to 69. A statistical analyses have been performed to find out the modern women's consciousness and behavior toward domestic making of clothing. The following facts have been found.
1) There are 64 percent women who have ever made at least one article of clothings during the last year. 53.4 percent out of them have voluntarily made their clothings. Concering their skill, about 70 percent of women have fairly enough ones in sewing and knitting techniques.
2) In respect to the motivation of making their clothings, they considered it as a mental satisfaction such as pleasure of having their own hand-made clothings, enjoying the process of making, and representation of their affection to their family, rather than as rationality such as saving in the expenditure on clothing and fitness to their bodies.
3) To modern women, domestic making of clothing means lessons as a self-development, a hobby and subject of communication worth living.

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