In 1922 Samuel Gordon¿s ¿The Mineralogy of PA¿ was pub. by the Acad. of Natural Sci. of Phila., & was later reprinted twice. The editing of the material incorp. in this updated vol. utilizes & brings up-to-date the more significant data bearing on mineral discoveries, occurrences & origin, & covers the period of pub. of a one-page column, ¿PA Minerals,¿ in the Keystone Newsletter, monthly journal of the Mineralogical Soc. of PA from 1962-1965. Contents: (1) Aims, & Contents; (2) Revised List of PA Minerals; (3) Descriptive Mineralogy of Newly Recorded Species; (4) New Data on Earlier Recorded Minerals: Minerals of Historical Interest; Minerals of Geochem. Interest; & Zeolites & Related Secondary Minerals; & (5) Index of PA Minerals & Mineral Localities. Illus.
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