The Rare EarthsNote 466 — Chapter XVI · THE GROUP IVA ELEMENTS (continued)—ZIRCONIUM AND THORIUMReading editionCompt. rend. 1912, 154, 821.◇[467] Ibid. 1234.◇Copy noteReturn to CHAPTER XVI THE GROUP IVA ELEMENTS (continued)—ZIRCONIUM AND THORIUMReturn to CHAPTER XVI THE GROUP IVA ELEMENTS (continued)—ZIRCONIUM AND THORIUM