SPENCER: _Principles of Sociology_.
SPITZKA: _Insanity_.
STANLEY: _In Darkest Africa_.
STEPHENS: _Yucatan_.
STUHLMAN: _Mit Emin Pasha_.
STRABO: _Works_.
TEULON: _Orig. de la Famille_.
TYLOR: _Anthropology_.
VIGNOLI: _Myth and Science_.
VOGT: _Lectures on Man_.
WAPPAUS: _Allgem. Bevoelkerungsstatistik_.
WALLACE: _Travels on the Amazon_.
WESTERMARCK: _Human Marriage_.
WHITE: _History of the Warfare of Science with Theology_.
WALLACE: _The Malay Archipelago_.
WEIR: _Dawn of Reason_.