File:Roy 1790 Plate 09 Triangles for Distance between Greenwich and Paris.jpg

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Triangles for Distance between Greenwich and Patis

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Description
English: Plate XX from: Roy, William (1790). "An account of the trigonometrical operation, whereby the distance between the meridians of the Royal Observatories of Greenwich and Paris has been determined". Philosophical Transactions of the Royal Society of London 80: 111-614. Title: "Plan of the triangles whereby the distance between the Royal Observatoriesof Greenwich and Paris has been determined"
Date
Source https://archive.org/details/paper-doi-10_1098_rstl_1790_0015
Author Roy, William, 1726-1790

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