The use of the universal ring-dial. Worgan, John, surveyor. This text is an enriched version of the TCP digital transcription A96930 of text R186866 in the English Short Title Catalog (Wing W3581A). Textual changes and metadata enrichments aim at making the text more computationally tractable, easier to read, and suitable for network-based collaborative curation by amateur and professional end users from many walks of life. The text has been tokenized and linguistically annotated with MorphAdorner. The annotation includes standard spellings that support the display of a text in a standardized format that preserves archaic forms ('loveth', 'seekest'). Textual changes aim at restoring the text the author or stationer meant to publish. This text has not been fully proofread Approx. 2 KB of XML-encoded text transcribed from 1 1-bit group-IV TIFF page image. EarlyPrint Project Evanston,IL, Notre Dame, IN, St. Louis, MO 2018 A96930 Wing W3581A ESTC R186866 47683577 ocm 47683577 173032 2240883364

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Early English books online. (EEBO-TCP ; phase 1, no. A96930) Transcribed from: (Early English Books Online ; image set 173032) Images scanned from microfilm: (Early English books, 1641-1700 ; 2661:37) The use of the universal ring-dial. Worgan, John, surveyor. 1 sheet ([1] p.). s.n.], [London : 1696. Attributed to John Worgan by Wing (2nd ed.). "This Instrument, or any other useful for the Mathematicks, are Made and Sold by Tho. Walpoole at the Sign of the Mariner and Compass in the Minories. 1696." The words "Mariner and Compass" have been lined through and replaaced in ms. by "Unicorn." Reproduction of original in: William Andrews Clark Memorial Library, University of California, Los Angeles. eng Sundials -- Early works to 1800. Advertising fliers -- Early works to 1800. Broadsides -- England -- London -- 17th century. eebo The use of the universal ring-dial. Worgan, John, surveyor 1696 1 405 0 0 0 0 0 0 0 A This text has no known defects that were recorded as gap elements at the time of transcription. 2007-06 Assigned for keying and markup 2007-06 Keyed and coded from ProQuest page images 2007-07 Sampled and proofread 2007-07 Text and markup reviewed and edited 2008-02 Batch review (QC) and XML conversion
The USE of the Universal Ring-Dial .
To find the hour of the Day .

SEt the Stroke in the Sliding Piece , to the Latitude of the Place , and set the Stroke crossing the little hole in the Bridge or Middle Piece , to the Day of the Month ; then open the Rings , and hold them up by the Little Ring , and move the Bridge , or Middle Piece , so towards the Sun , according as you may think to be near the Hour , and move it gently this way and that , till the Sun shining thorow the little hole in the Bridge , you can discern a little Ray or Speck of Light , to fall upon the Aequinoctial , within side , among the Hours ; and the Point in the Middle Line , whereon the Ray or Speck falleth , is the True Hour of the Day .

To find the Altitude of the Sun .

Set the Stroke in the Sliding Piece , to the beginning of Degrees , and put a Pin thorow the Hole on the Back-side of the Ring , and the Shadow of the Pin shall shew the Altitude on the Large Quadrant on the Back-side .

To find the Suns Declination .

Set the Stroke crossing the little hole in the Bridge , to the Day of the Month , and against it , on the other side , is the Sun's Declination .

To find the Latitude of the Place .

First find the Sun's Meridian , or greatest Altitude for that Day observ'd ; then find the Sun's Declination for that Day . If that you make your Observation in the Summer Half Year , viz. from the 10th of March to the 12th of September , then you must substract the Declination from the Altitude ; but if you observe in the Winter Half Year , viz. from the 12th of September to the 10th of March , then you must add the Declination of the Altitude , and either of those Numbers is the Height of the Aequinoctial , which substract from 90 degrees , is the Latitude of the Place .

This Instrument , or any other useful for the Mathematicks , are Made and Sold by Tho. Walpoole at the Sign of the Mariner and Compass in the Minories 1696.