A Theory of Nerve-Conduction

fore be stated that, notwithstanding the many difficulties in the way of such studies among primitive peoples, there have been made some serious beginnings in this very important line of anthropological investigation. As to detailed results, nothing can be said until a careful and necessarily tedious elaboration of the data is completed. The third main object of anthropological field work under the auspices of the Smithsonian Institution during the last three years was the search in Asia for probable traces of the ancient stock or stocks of mankind, from which the American Indians were derived. On this subject a number of preliminary reports have already been published4 and it is unnecessary to do more in this place than to state that such traces undoubtedly exist in Asia to this day, that they extend over a very large territory, and that they are soon to receive further attention by the Smithsonian Institution.