PRINCIPLES OF BIOLOGY. 2 vols... PRINCIPLES OF PSYCHOLOGY. PRINCIPLES OF SOCIOLOGY. Vol. I. CEREMONIAL INSTITUTIONS.. POLITICAL INSTITUTIONS THE DATA OF ETHICS 16s. 34s. 2 vols. [For particulars see end of the volume.] WILLIAMS AND NORGATE, 14, HENRIETTA STREET, COVENT GARDEN, London. ALSO MR. SPENCER'S DESCRIPTIVE SOCIOLOGY, COMPILED AND ABSTRACTED BY PROF. DUNCAN, DR. SCHEPPIG, & MR. COLLIER, [For particulars see end of the volume.] WILLIAMS AND NORGATE, 14, HENRIETTA STREET, COVENT GARDEN, LONDON. |