IN their differences these two books bring out very clearly the difficulties that beset the teacher of historical geology (stratigraphy) to-day. An ever-increasing knowledge of the detail of local ...

Science in the silver age: Aetna, a classical theory of volcanic activity -- Some Neo-Platonic and Stoic influences on mineralogy in the sixteenth and seventeenth centuries -- Mechanical mineralogy -- ...

No work on any science has yet been published in our language more exhaustive of facts, more clear in statement, or more philosophical in general character and arrangement, than Dana’s “ Mineralogy,” ...

(1) PROF. AMADEUS GRABAU, who is now professor of palaeontology in the University of Peking and paleontologist to the Geological Survey of China, is the author of several excellent American geological ...

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