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 PERVINQUIERE, L. Aristide Toucas. [Obit,] Bull. Soc. geol. France, 



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PETERS, K. Tiber die Darstellung und Verwendung der seltenen Erden. 



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PETERSEN, J. B. See Wesenbeeg-Lund, C. 

 PETERSON, W. See Stewart, R. 



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PETTERD, W. F. See Twelvetkees, W. H., 12. 



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PEYER, B. Uber Ceratodusfunde aus dem Kant on Schaffhausen. Verb, 

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PEYROT, A. See Cossmann, M., 7 & 8. 



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PHALEN, W. C. Salt Making by Solar Evaporation. Trans. Am. Inst. 



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 PHILIP, J. C. Note on Certain Effluent Waters from Tin Dressing Floors 



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 PHILLIPS, A. H. New Zinc Phosphates from Salmo, British Columbia 



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2. Some New Forms of Natrolite. Ibid. xlii. pp. 472-474, fig. 1916. 



— —3. A Possible Source of Vanadium in Sedimentary Rocks. Ibid. xlvi. 



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 PHILLIPS, H. Volumetric Determination of Sulphur in Pyrites. Chem, 



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