NUMA NUMANTIUS (K. H. ULRICHS). =Inclusa.= Anthropologische Studien über mannmännliche Geschlechtsliebe. Leipzig, 1864. NUMA NUMANTIUS. =Formatrix.= Anthrop. Studien über urnische Liebe. Leipzig, 1865. NUMA NUMANTIUS. =Vindex.= Social-juristische Studien über mannmännliche Geschlechtsliebe. Leipzig, 1864. NUMA NUMANTIUS. =Vindicta.= Kampf für Freiheit u.s.w. Leipzig, 1865. NUMA NUMANTIUS. =Ara Spei.= Moralphil. und Socialphil. Studien über urnische Liebe. Leipzig, 1865. K. H. ULRICHS. =Gladius Furens.= Das Naturräthsel der Urningsliebe. Kassel, Württenberger, 1868. K. H. ULRICHS. =Memnon.= Die Geschlechtsnatur des mannliebenden Urnings. Schleiz, H. Heyn, 1868. K. H. ULRICHS. =Incubus.= Urningsliebe und Blutgier. Leipzig, A. Serbe, 1869. K. H. ULRICHS. =Argonauticus.= Zastrow und die Urninge. Leipzig, A. Serbe, 1869. K. H. ULRICHS. =Prometheus.= Beitärge zur Erforschung des Naturräthsels des Uranismus. Leipzig, Serbe, 1870. K. H. ULRICHS. =Araxes.= Ruf nach Befreiung der Urningsnatur vom Strafgesetz. Schleiz, Heyn, 1870. WALT WHITMAN. =Leaves of Grass,= in "Complete Poems and Prose." 1889-1890. WALT WHITMAN. =Democratic Vistas.= =Nuova Codice Penale per il Regno d'Italia.= A. COFFIGNON. =La Corruption à Paris.= Paris, La Librairie Illustrée. 7th edition. No date. INTRODUCTION. There is a passion, or a perversion of appetite, which, like all human passions, has played a considerable part in the world's history for good or evil; but which has hardly yet received the philosophical attention and the scientific investigation it deserves. The reason of this may be that in all Christian societies the passion under consideration has been condemned to pariahdom; consequently, philosophy and science have not deigned to make it the subject of special enquiry. Only one great race in past ages, the Greek race, to whom we owe the inheritance of our ideas, succeeded in raising it to the level of chivalrous enthusiasm. Nevertheless, we find it present everywhere and in all periods of history. We cannot take up the religious books, the legal codes, the annals, the descriptions of the manners of any nation, whether large or small, powerful or feeble, civilised or savage, without meeting with this passion in one form or other. Sometimes it assumes the calm and dignified attitude of conscious merit, as in Sparta, Athens, Thebes. Sometimes it skulks in holes and corners, hiding an abashed head and shrinking from the light of day, as in the capitals of modern Europe. It confronts us on the steppes of Asia, where hordes of nomads drink the milk of mares; in the bivouac of Keltish warriors, lying wrapped in wolves' skins round their camp-fires; upon the sands of Arabia, where the Bedaween raise desert dust in flying squadrons. We discern it among the palm-groves of the South Sea Islands, in the card-houses and temple-gardens of Japan, under Esquimaux snow-huts, beneath the sultry