Again, the manner in which the fire appears to have been originally kindled on these occasions favours the view that it was intended to be a mock-sun. For, as various scholars have seen,(729) it is highly probable that originally at these festivals fire was universally obtained by the friction of two pieces of wood. We have seen that this is still the case in some places both at the Easter and midsummer fires, and that it is expressly stated to have been formerly the case at the Beltane fires.(730) But what makes it almost certain that this was once the invariable mode of kindling the fire at these periodic festivals is the analogy of the need-fires. Need-fires are kindled, not at fixed periods, but on occasions of special distress, particularly at the outbreak of a murrain, and the cattle are driven through the need-fire, just as they are sometimes driven through the midsummer fires.(731) Now, the need-fire has always been produced by the friction of wood and sometimes by the revolution of a wheel; in Mull, for example, it was made by turning an oaken wheel over nine oaken spindles from east to west, that is, in the direction of the sun. It is a plausible conjecture that the wheel employed to produce the need-fire represents the sun;(732) and if the spring and midsummer fires were originally produced in the same way, it would be a confirmation of the view that they were originally sun-charms. In point of fact there is, as Kuhn has pointed out,(733) some evidence to show that the midsummer fire was originally thus produced. For at Obermedlingen in Swabia the “fire of heaven,” as it was called, was made on St. Vitus’s Day (15th June) by igniting a cart-wheel, which, smeared with pitch and plaited with straw, was fastened on a pole twelve feet high, the top of the pole being inserted in the nave of the wheel. This fire was made on the summit of the mountain, and as the flame ascended, the people uttered a set form of words, with eyes and arms directed heaven-ward.(734) Here the fact of a wheel being fixed on the top of a pole and ignited makes it probable that originally the fire was produced, as in the need-fire, by the revolution of a wheel. The day on which the ceremony takes place (15th June) is near midsummer; and we have seen that in Masuren fire is (or was) actually made on Midsummer Day by turning a wheel rapidly about an oaken pole, though it is not said that the new fire so produced is used to light a bonfire.