A Complete Dictionary of Dry Goods And History of Silk Cotton Linen Wool And
A Complete Dictionary of Dry Goods And History of Silk Cotton Linen Wool And
George S Cole
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Flax and hemp become slightly brown. The red coloration, however, does not re- main long, and the proportion of jute mixture can only be roughly shown. To distinguish linen from cotton, dip the sample or samples in a boiling solution o"f caustic potassa, and let it remain a few minutes. The the linen will assume a dark yellow, while the cotton will be a light yellow, or nearly white. To distinguish linen from wool, dip the sample or samples in a boiling solution of caustic soda (8 deg. B). Let ...it remain for two hours at a steady- boil and all the wool will be dissolved, leaving the linen unchanged. Silk is dissolved by cold nitric acid which does not affect wool. To distinguish thin linen from thin cotton cloth, moisten the tip end of a finger and apply it to the cloth. If it be linen the moisture will be ab- sorbed quickly; if cotton, it will come through more slowly. The fineness of linen is determined by the relative length of yarn in a given weight, and also by the number of warp-threads contained in a cer- tain space of the reed in weaving, to which the weft threads in a similar space must bear a fixed and regular proportion.
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