Model experiment of blowing almost continuously air jet on a yarn is carried out in order to explain how interlaced yarn is processed. Effect of air pressure and nozzle height on the production process of interlaced yarn is also clarified. Results obtained are as follows.
(1) Tangling and opening parts are formed intermittently even when a yarn is exposed almost continuously to air jet. For the small interval of blowings, tangling and opening parts are formed more periodically and resultantly the number of tangles is larger.
(2) When an air jet is exerted near the position where an opening part has alreadybeen formed, tangling parts at both ends of the opening part become more stable and can not be opened even if they are subjected to air jets. Subsequent new tangling and opening parts can be formed at a certain distance fromthe previous opening part.
(3) The number of tangles increases with increasing the air pressure. However, very high air pressure makes the number of tangles small because long tangling parts are formed.
(4) When the nozzle height is 1 mm, the number of tangles is small because the airjet force acting on a yarn is extremely strong and the tangling part already formed is removed exceptionally.

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We use the spin line method, which is developed by Jones et al., to measure the extensional viscosity of polymer solutions and suspensions of fine particles in polymer solutions. From the velocity profiles obtained it is found that a uniaxial extensional flow is nearly attained in this experiment. We show that all the solutions of PAA are tension-thickening and the extensional viscosity in the suspensions is affected by the concentrations of both polymer and suspended particle.

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This study attempted to contrast catalog buyers versus noncatalog buyers of clothings by attitudes concerning purchase of merchandise, attitudes toward the use of clothing catalog, and socio-demographic variables. The questionnaire was handed to 330 women in age from 18 to 65 yrs, yielding a total sample of 247. The respondents were classified as either catalog buyers numbered 138 or noncatalog buyers numbered 109 if they had or had not placed catalog orders during the past 12 months.
Three factors of attitudes concerning purchase of merchandise, seven socio-demographic characteristics (age, marital status, occupation, education, residential location, family income, clothing expenditures) used as the independent variables in Hayashi's Quantification Model II, which is a multivariate discriminant analysis for qualitative data. Factor 1 (curiosity) and factor 3 (economy) of the attitudes concerning purchase of merchandise, age, education, and occupation were found to be effective variables in discriminating between catalog and noncatalog buyers.
Results of t-test indicated that there were significant differences for 11 of 17 statements of attitudes toward the use of clothing catalog between the two buyers.

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