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引言蚕丝为吾国重要输出品之一。抗战以前,据全国蚕丝委员会之估计,全国每年可产乾茧四十余万担。鲜茧十担,可制乾茧三担,经生丝一担。西南各省,以四川为主要产地,约占全国六分之一。蚕农将鲜茧售于缫丝厂,或自行缫丝后,所余之蛹大都用作肥料,几等废物,殊有研究利用之必要。同时四川盛产桐油,其副产品桐壳、桐皮、红粉等可
Introduction Silk is one of the important export products of our country. Before the war of resistance against Japan, it was estimated by the National Silk Commission that the whole country can produce more than 400,000 cocoons per year. Ten fresh cocoons can be made three dry cocoon, silk by a raw burden. Southwest provinces, with Sichuan as the main origin, accounting for about one-sixth of the country. Sericulture farmers will sell fresh cocoon reeling plant, or reeling their own, most of the remaining pupa used as fertilizer, a few other waste, special research necessary. At the same time rich in tung oil in Sichuan, its by-products Tong shell, Tong skin, red powder can be