The Elements of Geometrie by Henry Billingsley
= The Elements of Geometrie by Henry Billingsley
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{tag=Work by Henry Billingsley}
{title2=1570}
English <Euclid> translation with commentary. The Text Creation Partnership transcription identifies the title page and Book VII, Definition 23. Modern numbering of the corresponding <perfect number> definition is VII.22. The linked repository also records the transcription's bibliographical provenance.
Online source: https://github.com/textcreationpartnership/A00429