The purpose of this paper is fourfold:1) to summarize some of the relative data; 2) to point out some of the weaknesses of the present systems of classification; 3) to suggest the lines along which modifications should be carried out; and 4) to propose a system for categorizing the relative geological data.It is concluded that there is a need for a more effective system of classification of ore deposits in general and those of magmatic affiliations in particular, based on all recognizable geological variations, and, as far as possible, free of any terminology or artificial divisions based on theoretical considerations.

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