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This wheel-shaped diagram illustrates the monthly movement of the tides, and shows the correspondences between the tides and the age of the Moon as set out in the English scholar Bede's (d. 735 CE) De natura rerum (On the nature of things, XXXIX). The T-O map of the inhabited world occupies the diagram's center. The twelve sectors contain brief characterizations of the twelve winds. The first of the three outer rings shows four tidal cycles of seven or eight days each; the next ring, labeled "water" (aqua) thirty times, represents the ocean surrounding the world. The last ring in this group gives the days of the lunar or synodic month, beginning at top. The four small circles at the corners--perhaps four representations of the Moon--give the days of the two lesser (or lowest) tides and the two greater (or highest) tides of the month.
Page data
- Page
- 1
- Source index
- 0
- Type
- photo
- Media ID
- 79202a1cdf40751f
- Size
- unknown
Document data
- ID
- 6549
- Core
- obj
- Type
- object
DTO data
{
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"contentType": "object",
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"title": "Tidal Diagram (Rota)",
"description": "This wheel-shaped diagram illustrates the monthly movement of the tides, and shows the correspondences between the tides and the age of the Moon as set out in the English scholar Bede's (d. 735 CE) De natura rerum (On the nature of things, XXXIX). The T-O map of the inhabited world occupies the diagram's center. The twelve sectors contain brief characterizations of the twelve winds. The first of the three outer rings shows four tidal cycles of seven or eight days each; the next ring, labeled \"water\" (aqua) thirty times, represents the ocean surrounding the world. The last ring in this group gives the days of the lunar or synodic month, beginning at top. The four small circles at the corners--perhaps four representations of the Moon--give the days of the two lesser (or lowest) tides and the two greater (or highest) tides of the month.",
"provenance": "Gruel and Englemann Collection, Paris [1]; acquired by Henry Walters, Baltimore, 1903; by bequest to Walters Art Museum, 1931.[1] no. 131, bookplate on inside upper board",
"date": "late 12th century",
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Document identity
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Document source metadata
{
"id": "6549",
"sourceUrl": "https://purl.thewalters.org/art/W.73.8V",
"contentType": "object",
"stage": "normalized",
"title": "Tidal Diagram (Rota)",
"description": "This wheel-shaped diagram illustrates the monthly movement of the tides, and shows the correspondences between the tides and the age of the Moon as set out in the English scholar Bede's (d. 735 CE) De natura rerum (On the nature of things, XXXIX). The T-O map of the inhabited world occupies the diagram's center. The twelve sectors contain brief characterizations of the twelve winds. The first of the three outer rings shows four tidal cycles of seven or eight days each; the next ring, labeled \"water\" (aqua) thirty times, represents the ocean surrounding the world. The last ring in this group gives the days of the lunar or synodic month, beginning at top. The four small circles at the corners--perhaps four representations of the Moon--give the days of the two lesser (or lowest) tides and the two greater (or highest) tides of the month.",
"provenance": "Gruel and Englemann Collection, Paris [1]; acquired by Henry Walters, Baltimore, 1903; by bequest to Walters Art Museum, 1931.[1] no. 131, bookplate on inside upper board",
"date": "late 12th century",
"citationUrl": "https://purl.thewalters.org/art/W.73.8V",
"rightsUri": "CC0",
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Document source extras
{
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Page context
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