cality associated with the traits its inhabitants possess. Such classifications of data are needed by investigators seeking to determine the manner of inheritance of specific human traits.
Note that these cards are all used for indexing the Migrainous Joneses of Fairfield County, Conn. That other traits of the family would be indexed on other trait-surname and surname-trait cards; and other trait-locality and locality-trait cards. That many other families are recorded on the locality-trait and trait-locality cards. That many other traits are recorded under the surname-locality and the locality-surname card. That these weave into the whole indexing system, which permeates the ready reference to the desired data on the bases heretofore named.
It is highly desirable that all institutions concerned with investigations in human inheritance adopt a uniform system of indexing their material, and this scheme, which has been carefully worked out by Dr. Davenport of the Eugenics Record Office is suggested as a tentative working basis for such a system of indexing. It is apparent that such a system followed up by all the institutions of the country would, in a few years, index all the defective germ plasm of the nation, making the study of the traits more satisfactory and enabling authorities to circumscribe the defect with a view to its ultimate extirpation. A conference of interested institutions to further standardize this system is highly desirable.