By the application of principal component analysis to the foot measurements of 174 males and 205 females ranging from sixty to ninety in age, the author discussed the factors of foot form and the differences of principal component scores by sex. The results were as follows:
(1) In the case of analyzing the male and female groups separately, there are differences in significances of the 1st p.c., the 2nd p.c. and the 3rd p.c. but there is no difference in significance of the 4th p.c.. Therefore results of analyzing 2 groups separetely are used effectively in the case of designing distinct kinds of footwear in males and females.
(2) In the case of analyzing both the male and female en broc, the 1st principal component signifies the factor of total foot mass, the 2nd p.c, signifies the factor of the proportion of instep height to length, the 3rd p.c. signifies the factor of the proportion of breadth or girth to foot length, and the 4th p.c. signifies the factor of both width of ball angle and the proportion of inner plantar arch length to foot length. The average scores of the 1st p.c. of the male are significantly higher than those of the female, but the average scores of the 3rd p.c. of the male and the 4th p.c. of the 60-70 age group of the male are significantly lower than those of the female.

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The fading behaviors of six vinylsulfonyl (VS) reactive dyes on cotton fabrics estimated by the ‘A’ method of JIS L 0888 using various kinds of artificial perspiration were analyzed by the fading mechanism of VS dyes on cellophane examined by the exposure in aqueous solutions containing oxygen and substrates in this series of studies. In general, the oxidative fading on cotton fabrics occurred mainly in the initial period of exposure, while the reductive one in the following period of exposure when there were sufficient amounts of substrate on fabrics. The artificial perspiration of JIS L 0848 gave a small reductive fading.
The defects of the testing method of JIS L 0888 for the simultaneous effect of light and perspiration were extracted according to the analysis of fading behaviors on fabrics.

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