Thus far we have been considering chiefly that branch of sympathetic magic which may be called homoeopathic or imitative. Its leading principle, as we have seen, is that like produces like, or, in other words, that an effect resembles its cause. The other great branch of sympathetic magic, which I have called Contagious Magic, proceeds upon the notion that things which have once been conjoined must remain ever afterwards, even when quite dissevered from each other, in such a sympathetic relation that whatever is done to the one must similarly affect the other.​[630] Thus the logical basis of Contagious Magic, like that of Homoeopathic Magic, is a mistaken association of ideas; its physical basis, if we may speak of such a thing, {p175} like the physical basis of Homoeopathic Magic, is a material medium of some sort which, like the ether of modern physics, is assumed to unite distant objects and to convey impressions from one to the other. The most familiar example of Contagious Magic is the magical sympathy which is supposed to exist between a man and any severed portion of his person, as his hair or nails; so that whoever gets possession of human hair or nails may work his will, at any distance, upon the person from whom they were cut. This superstition is world-wide; instances of it in regard to hair and nails will be noticed later on in this work.​[631] While like other superstitions it has had its absurd and mischievous consequences, it has nevertheless indirectly done much good by furnishing savages with strong, though irrational, motives for observing rules of cleanliness which they might never have adopted on rational grounds. How the superstition has produced this salutary effect will appear from a single instance, which I will give in the words of an experienced observer. Amongst the natives of the Gazelle Peninsula in New Britain “it is as a rule necessary for the efficiency of a charm that it should contain a part of the person who is to be enchanted (for example, his hair), or a piece of his clothing, or something that stands in some relation to him, such as his excrements, the refuse of his food, his spittle, his footprints, etc. All such objects can be employed as _panait_, that is, as a medium for a _papait_ or charm, consisting of an incantation or murmuring of a certain formula, together with the blowing into the air of some burnt lime which is held in the hand. It need hardly, therefore, be said that the native removes all such objects as well as he can. Thus the cleanliness which is usual in the houses and consists in sweeping the floor carefully every day, is by no means based on a desire for cleanliness and neatness in themselves, but purely on the effort to put out of the way anything that might serve an ill-wisher as a charm.”​[632] I will now illustrate the principles of Contagious Magic by examples, beginning with its application to various parts of the human body. {p176}