up connected, actual cases, and putting them into a synoptic chart; again, a table ought to be drawn up of all the gifts and presents customary in a given society, a table including the sociological, ceremonial, and economic definition of every item. Also, systems of magic, connected series of ceremonies, types of legal acts, all could be charted, allowing each entry to be synoptically defined under a number of headings. Besides this, of course, the genealogical census of every community, studied more in detail, extensive maps, plans and diagrams, illustrating ownership in garden land, hunting and fishing privileges, etc., serve as the more fundamental documents of ethnographic research.
A genealogy is nothing else but a synoptic chart of a number of connected relations of kinship. Its value as an instrument of research consists in that it allows the investigator to put questions which he formulates to himself in abstracto, but can put concretely to the native informant. As a document, its value consists in that it gives a number of authenticated data, presented in their natural grouping. A synoptic chart of magic fulfils the same function. As an instrument of research, I have used it in order to ascertain, for instance, the ideas about the nature of magical power. With a chart before me, I could easily and conveniently go over one item after the other, and note down the relevant practices and beliefs contained in each of them. The answer to my abstract problem could