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@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

sub:Head {
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    np:hasAssertion sub:assertion;
    np:hasProvenance sub:provenance;
    np:hasPublicationInfo sub:pubinfo .
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sub:assertion {
  <https://w3id.org/delphi/resource/claim/steno1669-01> a <https://w3id.org/delphi/ontology/Claim>;
    dc:description "In crystals of quartz the number and length of the sides vary from specimen to specimen, but the angles between corresponding faces do not change.";
    dc:type "empirical-generalization";
    <http://www.w3.org/2000/01/rdf-schema#comment> "Formalization: contingent. The law of constancy of interfacial angles. Follows from a lattice model (angles fixed by the cell), so the empirical content is that natural crystals of one species share one cell.";
    <http://www.w3.org/2000/01/rdf-schema#label> "The angles of a crystal are constant while the number and length of its sides vary";
    <http://www.w3.org/2004/02/skos/core#notation> "\\theta_{hkl,h'k'l'} = \\text{const across specimens of one species}";
    <https://w3id.org/delphi/ontology/context> "Steno N, “De solido intra solidum naturaliter contento dissertationis prodromus”, Macmillan, New York (Univ. of Michigan Studies, Humanistic Series XI), English translation by John Garrett Winter, 1916 (1669); Prodromus, explanation of figures 5 and 6, p. 272. Scope: Quartz crystals (and by extension crystals of one substance); interfacial angles." .
}

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    dc:bibliographicCitation "Steno N. De solido intra solidum naturaliter contento dissertationis prodromus. Macmillan, New York (Univ. of Michigan Studies, Humanistic Series XI), English translation by John Garrett Winter, 1916 (1669), 205-283";
    dc:creator "Nicolaus Steno";
    dc:date "1669"^^xsd:gYear;
    dc:description "Winter's 1916 translation with Hobbs's foreword; the Latin original is in archive.org nicolaistenonisd00sten. The translation's year is 1916; the graph dates the claims to 1669.";
    dc:rights "Public domain (1669; translation 1916).";
    dc:title "De solido intra solidum naturaliter contento dissertationis prodromus";
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    prov:hadPrimarySource <https://archive.org/details/prodromusnicola00wintgoog>;
    prov:wasQuotedFrom <https://archive.org/details/prodromusnicola00wintgoog>;
    <https://schema.org/text> "in the plane of the axis both the number and the length of the sides are changed in various ways without changing the angles" .
  
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}

sub:pubinfo {
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  this: dc:created "2026-11-07T03:18:23.997Z"^^xsd:dateTime;
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    npx:introduces <https://w3id.org/delphi/resource/claim/steno1669-01>;
    <http://www.w3.org/2000/01/rdf-schema#label> "Nicolaus Steno 1669 claim: The angles of a crystal are constant while the number and length of its sides vary";
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