. . . . "Mechanical division, the only means of finding a mineral's true primitive form, proves that this form is invariable for one substance, however diverse the crystal forms of that substance." . "empirical-generalization" . . "Mechanical cleavage reveals a primitive form that is invariable for a substance" . "Haüy RJ, “Traité de minéralogie, tome premier”, Conseil des Mines, Paris (Chez Louis) (1801); Division mécanique, p. 44. Scope: Cleavable minerals; the cleavage rhombohedron or cube." . "Haüy RJ. Traité de minéralogie, tome premier. Conseil des Mines, Paris (Chez Louis) (1801)" . "René Just Haüy" . "1801"^^ . "Volume 1 holds the general theory of crystal structure: integrant molecules, the primitive form, and the laws of decrement first published in the 1784 Essai. The 1784 Essai (archive.org bub_gb_HbJDAAAAcAAJ) was fetched but its eighteenth-century OCR (long s) is too corrupt to quote; see SEARCHES.md. French." . "Public domain (1801)." . "Traité de minéralogie, tome premier" . . . . "Reading copy of Traité de minéralogie, tome premier" . . . "delphisci crystals-and-form claim extractor" . . . . "Claude Fable 5.1" . . . . . . . . . . . . "Page 44 of the reading copy; paragraph 297 of the normalised text 1801-hauy.txt (sha256 75e8725eafc33d75d3da5d556fa40bdfeaf55bd1fcb6fddfa8cdb23a59082d19), produced by build/fetch.py and checked by build/check-quotes.mjs. The text itself is not committed." . . . "La division mécanique des minéraux, qui est le seul moyen de reconnoître leur vraie forme primitive , prouve que cette forme est invariable tant que l'on opère sur la môme substance" . . "75e8725eafc33d75d3da5d556fa40bdfeaf55bd1fcb6fddfa8cdb23a59082d19" . "Checksum of the normalised one-paragraph-per-line text derived from the reading copy, not of the reading copy itself." . "crystals-and-form" . "2026-11-07T03:18:23.997Z"^^ . . . . . "René Just Haüy 1801 claim: Mechanical cleavage reveals a primitive form that is invariable for a substance" . . "RSA" . "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyFHtPB6p0mCjDozxlOY9CmO3nBm7Te3jFbXyLmM+G1tGe47Da0jYIbhkl9Oo1ZjxmCa3LCwlEqK8gj6hEIcL4ahW30JXh9HycfKVk1bugkzMEV15tJdTzAU3sGMFnbNsn43xY2LFLy45tApkRm5byEiM7oRRrooIdwoQKnP4Wzq/bfAoJ9qvW+MGkelyOTd1jbSt+KfmT7xKmDfWzAHddUlWwMX2QJOLxDaffOteTop6ZRgPiNmPJKA/S62Gac9XtSYT3oDkZ6/nr5cxxNLpOyxTf5FPISiCe11xYO/unYjY+mwnOfA8yhJIyx1l0O9I0vpOpn+E5TvyHJV+oSTrvwIDAQAB" . "s2DnlsOSnTBaremQzotpd2xqvT0TmoD4FY0qeSHhWTG/jkTQndA9WW1KJf7n8ljwQGzcQMGhX5YZntZNDoOPNmqbIJYsnRwp34OYCV746UBLkRZs5+Tui7QOlZTa6PWZ3fANX5rkBT0rkzS/W3kUVUeWMftrveCD1hxNhJt7cczgc2/pVBurF+uvbT0B68NYoLxKXeBVmUe7/x3SwR/z/ajRBVwy4Wx28XlFzWltmggPq53+SqWC3vmZdOFg3RDm08VP+dDjNfGpwc8XhtIeKFb7Ae+nV4IFtEo5X2u5CMasasa+VoWN3IZ4AnBC5YRlx40s4sSw9GqA+5HAjq4O1g==" . . .