Question

which fibre burns slowly and gives out a ell of burning hair​

Answer 1

Answer:

natural silk or pure silk

Answer 2

Silk: Burns slowly, but does not melt. It shrinks from the flame. It has the odor of charred meat (some say like burned hair). The residue is a black, hollow irregular bead that can be easily to a gritty, grayish-black ash powder.