. . . . "Very different substances present absolutely the same form: fluorite, rock salt, pyrite and galena all crystallise in cubes, and the same minerals with alum and diamond take the regular octahedron." . "empirical-generalization" . . "Different substances can share exactly the same crystal form" . "Haüy RJ, “Traité de minéralogie, tome premier”, Conseil des Mines, Paris (Chez Louis) (1801); Discours préliminaire, p. 11. Scope: Cubic minerals; form shared across chemistry." . "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 11 of the reading copy; paragraph 272 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." . . . "on rencontre des substances très-dilferentes qui présentent absolument la même forme. Ainsi la chaux fliiatée , la soude muriatée , le fer sulfuré, le plomb sulfuré , etc. cristallisent en cubes dans certaines circonstances" . . "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: Different substances can share exactly the same crystal form" . . "RSA" . "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyFHtPB6p0mCjDozxlOY9CmO3nBm7Te3jFbXyLmM+G1tGe47Da0jYIbhkl9Oo1ZjxmCa3LCwlEqK8gj6hEIcL4ahW30JXh9HycfKVk1bugkzMEV15tJdTzAU3sGMFnbNsn43xY2LFLy45tApkRm5byEiM7oRRrooIdwoQKnP4Wzq/bfAoJ9qvW+MGkelyOTd1jbSt+KfmT7xKmDfWzAHddUlWwMX2QJOLxDaffOteTop6ZRgPiNmPJKA/S62Gac9XtSYT3oDkZ6/nr5cxxNLpOyxTf5FPISiCe11xYO/unYjY+mwnOfA8yhJIyx1l0O9I0vpOpn+E5TvyHJV+oSTrvwIDAQAB" . "kSiDpBMxKiGcA4UutREGQXXj4EoU21Ipf3i6amsi/wUdfD8ZkecPBJTetSKXlUiB2Da47rf3z7JxKClqiHp0HTYJchJV1H9KdcJYeaHPXyG15EvZVjDno0wlCEjLTRUmNLdbHUef6qiBd5q2k9AxJeQ2kZRJ2uyHvKItfYtCBx5bttztXx5IaAKn61/46H+3PHAFQWWpe6KMmr++tdq98UN/madBiNGYIRaDMzqLe9tEVp+79CxS6OZvk0OM/n2WpHt7z774cVg3N/QXVCyIlzCC03YJw4DAhOVTPmDQ0SmLw/bDM6jCok6Ly1gejZmcX8WwaTjRdwdfduOVOjdIwQ==" . . .