M. A. Thieullen, publishing the results of fifteen years' studies among the flint implements of the French beds, draws the conclusions that the elaborate palæolithic flint axe and hammer and the typical neolithic implements were luxuries used by the more distinguished members or for the more important purposes of the flint-implement-using community, while the ruder implements which are found in enormous numbers were the objects of general and daily use throughout all the flint-using ages, whether palæolithic or neolithic. BRAIN WEIGHTS AND INTELLECTUAL CAPACITY. BY JOSEPH SIMMS, M. D. Having been for thirty years a lecturer on man and his character as evinced by his form, features, head, and gestures, and having made observations on the subject in all parts of North America, in continental Europe and Great Britain, and parts of Asia, Africa, and Australia, I should not be deemed presumptuous when I present a few facts regarding the relations of mind and the size and forms of heads and weights of brains. It has been observed by many persons versed in the branches relating to the subject that men with the largest brains are not those of most talent, power, or intellect; but many such have been only ordinary or inferior men, or even idiots; while some men of most powerful and comprehensive minds have had unusually small brains. Esquirol's assertion that no size or form of head or brain is incident to idiocy or to superior talent is borne out by my observations.