History of the inductive sciences, from the earliest to the present timeNote 20 — Chapter II · Epoch of Romé De Lisle and Haüy.—Establishment of the Fixity of Crystalline Angles, and the Simplicity of the Laws of Derivation.Reading editionTraité de Minér. 1822, i. 15.◇Copy noteReturn to CHAPTER II. Epoch of Romé De Lisle and Haüy.—Establishment of the Fixity of Crystalline Angles, and the Simplicity of the Laws of Derivation.