Professor Josiah Royce, of the Department of Philosophy, will deliver the seventh of the series of eight lectures on "The Problems of Christianity" in Huntington Hall, 491 Boylston street, Boston, this evening at 8 o'clock. The subject for this evening's address is "The Christian Doctrine of Life." The lectures, which are given under the auspices of the Lowell institute, are free and open to the public.