In Sweden the need-fire is called, from the mode of its production, either _vrid-eld_, "turned fire," or _gnid-eld_, "rubbed fire." Down to near the end of the eighteenth century the need-fire was kindled, as in Germany, by the violent rubbing of two pieces of wood against each other; sometimes nine different kinds of wood were used for the purpose. The smoke of the fire was deemed salutary; fruit-trees and nets were fumigated with it, in order that the trees might bear fruit and the nets catch fish. Cattle were also driven through the smoke.[709] In Sundal, a narrow Norwegian valley, shut in on both sides by precipitous mountains, there lived down to the second half of the nineteenth century an old man who was very superstitious. He set salmon-traps in the river Driva, which traverses the valley, and he caught many fish both in spring and autumn. When his fishing went wrong, he kindled _naueld_ ("need-fire") or _gnideild_ ("rubbed fire," "friction fire") to counteract the witchcraft, which he believed to be the cause of his bad luck. He set up two planks near each other, bored a hole in each, inserted a pointed rod in the holes, and twisted a long cord round the rod. Then he pulled the cord so as to make the rod revolve rapidly. Thus by reason of the friction he at last drew fire from the wood. That contented him, for "he believed that the witchery was thus rendered powerless, and that good luck in his fishing was now ensured."[710] [The need-fire among the Slavonic peoples.] Slavonic peoples hold the need-fire in high esteem. They call it "living fire," and attribute to it a healing virtue. The ascription of medicinal power to fire kindled by the friction of wood is said to be especially characteristic of the Slavs who inhabit the Carpathian Mountains and the Balkan peninsula. The mode in which they produce the need-fire differs somewhat in different places. Thus in the Schar mountains of Servia the task is entrusted to a boy and girl between eleven and fourteen years of age. They are led into a perfectly dark room, and having stripped themselves naked kindle the fire by rubbing two rollers of lime wood against each other, till the friction produces sparks, which are caught in tinder. The Serbs of Western Macedonia drive two oaken posts into the ground, bore a round hole in the upper end of each, insert a roller of lime wood in the holes, and set it revolving rapidly by means of a cord, which is looped round the roller and worked by a bow. Elsewhere the roller is put in motion by two men, who hold each one end of the cord and pull it backwards and forwards forcibly between them. Bulgarian shepherds sometimes kindle the need-fire by drawing a prism-shaped piece of lime wood to and fro across the flat surface of a tree-stump in the forest.[711] But in the neighbourhood of Küstendil, in Bulgaria, the need-fire is kindled by the friction of two pieces of oak wood and the cattle are driven through it.[712]