File:RamsdenRS theodolite of 1787.jpg

Original file(572 × 962 pixels, file size: 93 KB, MIME type: image/jpeg)


English: The first of the three foot theodelites manufactured by Jesse Ramsden. Image published in "An Account of the Trigonometrical Operation, Whereby the Distance between the Meridians of the Royal Observatories of Greenwich and Paris Has Been Determined. By Major-General William Roy" (January 1, 1790). Now available at The illustration is from Plate III. (The plates are at the end of the bound volume but Plate III is at page 202 of the PDF file.) The full text description is on true pages 135-160 corresponding to pages 28-53 of the PDF file
Source Philosophical Transactions of the Royal Society of London, volume 80, 1790
Author William Roy
(Reusing this file)
See alsoFile:RamsdenRS theodolite of 1787 microscope detail.png


Public domain

This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer.

This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1925.


Add a one-line explanation of what this file represents

Items portrayed in this file


File history

Click on a date/time to view the file as it appeared at that time.

current21:34, 31 January 2015Thumbnail for version as of 21:34, 31 January 2015572 × 962 (93 KB)Peter MercatorUser created page with UploadWizard
The following pages on the English Wikipedia use this file (pages on other projects are not listed):

Global file usage