. Cyclopedia of textile work : a general reference library on cotton, woollen and worsted yarn manufacture, weaving, designing, chemistry and dyeing, finishing, knitting, and allied subjects . ^ cover-ing. It is built of a large number of spindle-shaped cells of amore or less horny character. The medullary or central portion of the wool (see Fig. 1)appears to be wholly lacking iu the finest grades of wool. Whennoticeable, it seems to be composted of larger cells than the sur- 31 24 TEXTILE CHEMISTKY AND DYEING. rounding cortical, which are more or less rhombic, or cubical, andof a marrowy natu
. Cyclopedia of textile work : a general reference library on cotton, woollen and worsted yarn manufacture, weaving, designing, chemistry and dyeing, finishing, knitting, and allied subjects . ^ cover-ing. It is built of a large number of spindle-shaped cells of amore or less horny character. The medullary or central portion of the wool (see Fig. 1)appears to be wholly lacking iu the finest grades of wool. Whennoticeable, it seems to be composted of larger cells than the sur- 31 24 TEXTILE CHEMISTKY AND DYEING. rounding cortical, which are more or less rhombic, or cubical, andof a marrowy nature. Under the microscope, this portion of thefibre appears darker than the rest, but may be rendered nearlytransparent by boiling with glycerine or turpentine. Wool is a very elastic fibre; much more so than any of thevegetable fibres. The average length of wool varies with the dif-ferent grades from to 20 inches, and the diameter from .004to .0018 inch. 51. Hygroscopic rioisture. Wool fibre is nuich more hygro-scopic than any of the vegetable fibres. The amount present may.
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