Hummel, J. J. (John James), -1902 · London : Cassell & Company · leaf 42
lth of individual, part of the body from which the wool is taken, &c. In colourless wool the medullary portion often appears under the microscope as a dark or dull hazy stripe. This appearance is caused by the air enclosed between the cells, so that by boiling such a fibre with turpentine or… … Wool Fibres. Figure 10 gives the cross sections, according to F. Bowman, of two typical wool fibres ; a shows the medullary, cortical, and external cells ; in b the medullary cells are absent. “ Kemps” are certain wool fibres not possessing the normal structure of good wool ; under the microscope…
Dyes and dyeing
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