Abstract
On this occasion I might follow the usual course and devote most of this address to a review of recent developments in mineralogy, with emphasis on that part of the subject in which I have taken some part, and conclude with the hope that the good work may continue on similar lines. Such a course is suitable in the evolutionary periods of the development of a science when the extent of the field of study and its relations to adjoining fields appear to be well-defined and generally accepted; when the underlying theories of the subject have been consolidated into definite doctrine which no longer requires defense; when important discoveries are rare and observations lead mainly toward the refinement of existing knowledge; when methods of observation, description, classification, and interpretation are established and further effort results chiefly in the improvement of numerical detail, systems of notation, and style of presentation; when comprehensive treatises can be compiled with deliberation and prospect of completeness; and when, as a consequence, scientific output can be fairly predicted as the product of trained men and working hours.
