14. — Earthquakes. In the Light of the New Seismology. By Clarenck 

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15.— The Nature of Man. Studies in Optimistic Philosophy. By Elie 

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A comprehensive and concise summary of the results of science in its chosen field. 

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17. — The Prolongation of Life. Optimistic Essays. By Elie Metch- 

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In his new work Professor Metchnikoff expounds at greater length, in the light of 

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18. — The Solar System. A Study of Recent Observations. By Prof. 

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19. — Climate — Considered Especially in Relation to Man. By Robert 

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20. — Heredity. By J. Arthur Thomson, M.A., Professor of Natural 

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21.— Age, Growth, and Death. By Charles S. Minot, James Still- 

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This volume deals with some of the fundamental problems of biology, and presents 

 a series of views (the results of nearly thirty years of study), which the author has 

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