Textiles for commercial, industrial, and domestic arts schools ; also adapted to those engaged in wholesale and retail dry goods, wool, cotton, and dressmaker's trades (1914)
Dooley, William H. (William Henry), 1880- · Boston, D. C. Heath · leaf 220
CHAPTER XVII SILK Silk. The silk of commerce is obtained from tiie cocoons of several species of insects. These insects resemble strongly the ordinary caterpillars. At a cer- … MOTH, SILKWORM, AND COCOONS tain period of its existence the silkworm gives oS a secretion of jelly-like substance. This hardens on exposure to the air as the worm forces it out and winds it about its body. It takes about three days for the worm to form the cocoon. After the cocoon has been formed…
Textile fabrics · Textile industry
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