# Analemma treats sundial geometry as a public instrument-text

Date: 150

## The fact

Analemma treats the geometry used to construct sundials. [Ptolemy](/people/ptolemy)’s documented role is: He wrote on the analemma for sundials. Later Latin is a carrier; he did not typeset it. Do not twin this with Handy Tables. A sundial diagram is not a geocentric computational recipe. Later editors, printers, and excavators remain named where they appear. Ptolemy's documented role is: He wrote on the analemma for sundials. Later Latin is a carrier; he did not typeset it.

## Context

A sundial-making tradition, unnamed copyists, and later Latin translators already sit in the file. A diagram-book is not unique authorship of every later garden dial. Later editions are access. Named others on the file: Unnamed copyists, later dial-makers, and Latin translators share the treatise. The public setting is the file around 0150-10-01. Unnamed clerks, soldiers, printers, or later editors may appear without becoming this instrument. The instrument stays Analemma treats sundial geometry as a public instrument-text. The setting of Analemma treats sundial geometry as a public instrument-text is the public file around 0150-10-01. Shared offices, unnamed crews, printers, or later editors may appear without becoming this instrument. Driver edu-[digital-learning-access](/drivers/edu-digital-learning-access) is attached because the significance names a mechanism from this act, not because a standing list needed coverage.

Shared responsibility is part of Analemma treats sundial geometry as a public instrument-text. Naming Ptolemy does not delete co-authors, institutions, or later transmitters. The lag from 0150-10-01 to any measured indicator is not treated as zero. Alternative explanations — weather, other armies, later statutes, or independent cultural change — remain live where the sources do not close them.

## Evidence and sources

Britannica independently identifies Analemma as a distinct Ptolemaic sundial text. Official: Britannica — Ptolemy, Analemma (https://www.britannica.com/biography/Ptolemy; Encyclopaedia Britannica). Independent: Britannica — sundial, analemma heritage (https://www.britannica.com/technology/sundial; Encyclopaedia Britannica). The two URLs are different pages. Where the carrier is a later edition or a received narrative, that limit is stated rather than upgraded to an autograph. Official carrier: Britannica — Ptolemy, Analemma (https://www.britannica.com/biography/Ptolemy; Encyclopaedia Britannica). Independent carrier: Britannica — sundial, analemma heritage (https://www.britannica.com/technology/sundial; Encyclopaedia Britannica).

Official or archival record: Britannica — Ptolemy, Analemma (https://www.britannica.com/biography/Ptolemy; Encyclopaedia Britannica).

## Significance

Improving education-access path: a public sundial-geometry treatise. Complex later carrier. Welfare reading improving. The attached mechanism is A dated sundial-geometry treatise put public time-finding diagrams into the instrument file, distinct from Handy Tables as computational lock. Lag to any modern indicator is not treated as zero. This path is attached because the mechanism is named from this act, not because a driver list needed coverage. The welfare reading on this path is improving.

## What is established and what is not

Established: Analemma as a Ptolemaic work. Not established: that Handy Tables is this same book. Established: a sourced public record of Analemma treats sundial geometry as a public instrument-text under 0150-10-01. Established: a sourced public record of Analemma treats sundial geometry as a public instrument-text under 0150-10-01.

Later competitions, monuments, translations, UNESCO listings, museums, and adaptations are not converted into extra lifetime acts.

If a number is not in the two records named above, it is not supplied here.

Confidence is stated on the impact path, not hidden in adjectives. Do not twin this with Handy Tables. A sundial diagram is not a geocentric computational recipe. Mixed effects of Analemma treats sundial geometry as a public instrument-text are separate paths.

The welfare reading used in this dossier is improving. That reading is an impact-path choice, not a property stored on the Fact itself.

## People

- Ptolemy: https://factrail.ai/people/ptolemy

## Drivers

- Digital Learning Access: https://factrail.ai/drivers/edu-digital-learning-access

## Sources

- https://www.britannica.com/technology/sundial
- https://www.britannica.com/biography/Ptolemy

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/pto-analemma