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sub:assertion {
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    dc:description "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.";
    dc:type "empirical-generalization";
    <http://www.w3.org/2000/01/rdf-schema#label> "Mechanical cleavage reveals a primitive form that is invariable for a substance";
    <https://w3id.org/delphi/ontology/context> "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." .
}

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    dc:bibliographicCitation "Haüy RJ. Traité de minéralogie, tome premier. Conseil des Mines, Paris (Chez Louis) (1801)";
    dc:creator "René Just Haüy";
    dc:date "1801"^^xsd:gYear;
    dc:description "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.";
    dc:rights "Public domain (1801).";
    dc:title "Traité de minéralogie, tome premier";
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    <https://schema.org/text> "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" .
  
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