Note 455 — APPENDIX B. RADIO-ACTIVE MINERALS.
Reading edition
An apparent exception has been observed by Danne in the case of certain lead minerals which occur under peculiar conditions at d’Issy-l’Évêque, France. See p. 465.
Reading edition
An apparent exception has been observed by Danne in the case of certain lead minerals which occur under peculiar conditions at d’Issy-l’Évêque, France. See p. 465.