Noxious Gases and the Principles of Respiration Influencing Their Action.

An attempt to trace the development of all geniuses from the generally abnormal elements of mankind, rather than from the well-bred, speaking from the eugenic point of view.When one has waded through these half- baked conclusions a mental refreshment may be recom- mended in the shape of Galton 's "Hereditary Genius".La Tuberculose M6dicale de l'Enfance.Maurice P6hu et Andre Dufourt. 740pages, avec figures dans le texte, 75 fr.Gaston Doin & Cie., Paris, 1927.The authors of this carefully written treatise assign but little weight to the persistently recurring theory of hereditary tuberculosis.The place of this they think will eventually be settled by deciding whether or not there are filterable forms of the tubercle bacillus.In the meanwhile what we have to deal with in the vast pro- portion of eases is infection during life.This is so simple a proposition that many overlook it.One fact which brings the study of tuberculosis in infancy within bounds is the absence of any other chronic condition at that age excepting syphilis.The distinguishing features between the two, however, as well as other limiting factors, are well marked.One of these features is that tuberculosis may exist in such complete latency from infancy till adult life.Some maintain that all adult tuberculosis begins in infancy: that it represents in the pieturestle words of the authors "a song which-the candid'ate for tuberculosis