Dictionary of Manufactures Mining Machinery And the Industrial Arts
Dictionary of Manufactures Mining Machinery And the Industrial Arts
George Dodd
The book Dictionary of Manufactures Mining Machinery And the Industrial Arts was written by author George Dodd Here you can read free online of Dictionary of Manufactures Mining Machinery And the Industrial Arts book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Dictionary of Manufactures Mining Machinery And the Industrial Arts a good or bad book?
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Hemp Manufactures. The processes to which the hemp is subjected are as follows : Retting. When the plants are ripe they are pulled up ; the leaves, flowers, and roots are cut off; and the stalks are tied up in bundles. To dissolve the vegetable gluten which holds the fibres together, the stalks are retted. This is done in many ways : by burying them for a time in snow ; by exposing them to the slow action of damp and dewy air ; by steeping them in ponds of still water; by steeping in running st...reams ; or by steeping in water which falls from one level to another in a series of artificial tanks or ponds. The hot- water retting and steam-retting, described under FLAX DRESSING have not been much employed for hemp. Preparing. When the fibres have been softened, or rather the glutinous substance softened, by retting, the stalks are taken up, dried in the open air or in the sun, and sometimes in heated rooms. All the subsequent processes are so nearly like those for flax that it will suffice to refer to the article FLAX PREPARATION for a brief account of them so far, at least, as concerns the use of hemp in making textile fabrics ; such as canvas, bagging, sacking, sail-cloth, tarpaulin, tent- cloth, marquee-cloth, &c.
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