page_title: A Treatise on the Astrolabe
hierarchical_section_title: A Treatise on the Astrolabe
caption_attribution_description: English: Astrolabe, the oldest dated in Europe.
context_page_description: A Treatise on the Astrolabe is a medieval instruction manual on the astrolabe by Geoffrey Chaucer. It describes both the form and the proper use of the instrument, and stands out as a prose technical work from a writer better known for poetry, written in English rather than the more typical Latin.
context_section_description: A Treatise on the Astrolabe is a medieval instruction manual on the astrolabe by Geoffrey Chaucer.  It describes both the form and the proper use of the instrument, and stands out as a prose technical work from a writer better known for poetry, written in English rather than the more typical Latin.
caption: So-called Chaucer Astrolabe dated 1326, similar to the one Chaucer describes, British Museum
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