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A simplified method for making shadowed thermoplastic negative replicas of fibrous mate rials was developed. Through this technique fine details of the morphology of the wool fiber, before and after treatment, were clearly revealed by the electron microscope. The structural implications of the electron micrographs are discussed with respect to the subject of wear and with reference to the observations of other investigators.
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Swerdlow et al. (1948) studied this question.
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