Hurst, George H. (George Henry), George Bell & Sons · London ; New York : George Bell & Sons · leaf 13
emale moth; d, the 2 SILK DYEING. male moth, shown full size. The cocoon, fig. 2, ismade up of a single fibre varying from 500 to 1,300yards in one unbroken length, with an average dia-meter of one-sevenhundredth of an inch. The cocoonsvary in colour from white to yellow. The silk fibreis secreted… … Fig. 1. i, 1, in which the silk substance is secreted; second,of two expanded portions, 2,2, in which the silk se-creted in 1,1, is stored; third, of two ducts, t,,3, orscripositors, which unite into one terminal duct, 4,from whence the silk fibre issues from the worm. Thisdouble system of…
Dyes and dyeing · Silk
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![An illustration from Episodes of insect life / by Acheta Domestica, [pseud.] ;edited and revised by J.G. Wood. (1879)](https://img.insideoutlibrary.com/img/200/wellcome-wellcome_b28066340-84-1.webp)
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