A simplified method for mak ing shadowed thermoplastic negative rcplicas of fibrou s materials 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. Th e structu ral implication s of the electron micrograph s are di sc ussed with respect to the s ubj ect of wcar a nd in refcrence to the obscrvations of other investigators.
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Swerdlow et al. (1948) studied this question.
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