It is clarified that the orientational anisotropy affects the formation and distribution of polygons in a planar random system of line segments. The probability, P (n), of finding an n-sided polygon in an anisotropic line system is related to the same, P (n |0), corresponding to the isotropic case by the equations : P (n) = (2GI-8/π²-8) P (n|0), for n=3 or n≥5, andP (4) = (2GI-8/π²-8) P(4|0)+(π²-2GI/π²-8) where, I and G are defined, in terms of the density function, q (θ), of orientation distribution, as I=∫^π/2_-π/2∫^π/2_-π/2q (θ) q (θ') |sin(θ-θ') |dθdθ' and G=∫^π/2_-π/2 (∫^π/2_-π/2q (θ) |sin (θ-θ') |dθ) ^-2dθ' The validities of these theoretical estimations are practically verified through Monte-Carlo simulations for two special cases.

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Since high-value added fabrics of polyester hard twist filament yarn which are main products in our prefecture has been woven by water jet looms, demand for polyester hard twist yarn is increasing rapidly. As a result, the dependence on the double twister which is superior in productivity to Italian twister is inceasing more and more.
On the other hand, the craping of double twister on which the feeling of hard twist yarn fabrics depends is different from Italian twister's.
A study has been made to investigate :
(1) What is the extent of the difference between craping produced by the double twister and that by the Italian twister?
(2) Interrelations among the condition of twisting, the condition of the fabric relaxation, craping and other physical properties of the twist yarn.
Through these investigations, we could get the following basic data :
(1) When the revolution speed of the spindle increases, the twisting tension also increases, the number of ribs tends to increase and fine craping tends to appear.
(2) At 12 000 rpm, craping appear scarecely difference if the setting condition is altered.
(3) From the viewpoint of the effect of the scouring teperature, the higher temperature, the more number of ribs and the finer rib. The most craping appears at 70→130°C/60 min.
(4) Double twister can easily produce stronger craping than Italian twister.

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Two parameters twist efficiency and yarn delivery speed ratio were adopted to clear the properties of the twisting and the yarn delivery of a blet nip twister to get a satisfactory twisting condition.
Although these parameters varied . with twister condition (B/Y ratio and intersecting angle of the belt), the relationship between the detwisting tension/twisting tension ratio and the yarn delivery speed ration is approximately on a master curve. And then, when the yarn delivery speed ratio was equal to one, the B/Y ratio was given by : (1/ (1+ε)) · (1/cos (θ/2))
where, ε : elongation ratio of untwisting,
θ : intersecting angle of the belt.

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The human cutaneous sensation on moisture is considered in this paper. This problem is related to the comfort of wearing. The final purpose of this investigation is to clarify the sensory mechanism of the clamminess. As the first step, several factors affecting the clamminess are determined. The results are summarised as follows
(1) When we touch a damper sample, the skin temperature decreases more than when we touch a dry sample. The reason of this phenomenon is that a damper sample has lower temperature and more heat-capacity. The clamminess of a sample is related to this heat-loss. So, it seems that the clamminess is considerably concerned with sensory of coldness.
(2) It also seems that the clamminess is related to the surface characteristics of sample. Because, in this study, we recognized the relationship between the clamminess and the coefficient of dynamic friction.
(3) The clamminess is considerably influenced by visual perception, too. The clamminess is connected with optical characterisitics of the smaple, especially diffusion reflection. The reduction rate of diffusion reflection is related to the clamminess. But, this visual perception for the clamminess is not so sensitive as tactile sensation.
Although we could not dealt with physiological mechanism of this sense, we could find a few factors and a few sensory receptors for the clamminess.

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In the previous report, the fiber content has been enhanced by the effective use of fiber forming characters and by applying not only the centrifugal force but also roll pressure and film back pressure.
This report analyzes the formation of high fiber content. The analysis has been made on the basis of an anisotropic model with several assumptions. Influences on the fiber content have been studied of the centrifugal force. roll pressure and film back force caused by the fiber lamination. In addition, the results of an experiment in the previous report is compared with this analysis.

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