Recently a lot of some ten specimens of a material of unusual character from Franklin Furnace, N. J., was submitted to the National Museum for study by Ward’s Natural Science Establishment of Rochester. This material contains several rare or new minerals but owing to their intimate intermixture it is being found exceedingly difficult to secure pure materials for analysis. The present paper is the first of several which will, in all probability be published on the basis of this material as the study of the minerals progresses.

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