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( xxvii ) Page Pi perino - — 415 Pumice — — ib. Of Stony Subftances ejefted, unaltered, or but flightly injured — 416 Of Pfcudo-Volcanos, and Superficial Fires 419 Of the Diftindtive Charadters of Volcanic and Neptunian Mountains — 420 Of Stones to which a Volcanic Origin has been improperly aferibed — 426 Of Shorls, or Bafaltines, and White Gamets ib. Zeolytes 428 Of Traps and Bafalts . — 431 Third Appendix. Of the Chemical Analyfis of Earths and Stones — — 439 EUR ATA.