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http://worldcat.org/entity/work/id/287368679

[Treatises on astronomical instruments]

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type

about

description

http://schema.org/description

  • "Anonymous treatise on constructing and using a horologium diei et noctis (combined sun dial and nocturnal), perhaps missing its first leaf, with 4 small tables (f. 4v, 6r, 6v, 8r). The uses include telling time of day and night, determining the times of sunrise and sunset and the precession of equinoxes and solstices, and measuring the height of stars. The first pages of an incomplete treatise on constructing a instrument for measuring angles called a baculus Jacob (called cross-staff or Jacob's staff in English, arbalestrille in French) follow."

genre

http://schema.org/genre

  • "Codices"
  • "Early works"
  • "Manuscripts, Renaissance"
  • "Tables (documents)"
  • "Manuscripts, Latin"
  • "Treatises"

name

http://schema.org/name

  • "[Treatises on astronomical instruments]"

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