Skip to main content

Cambridge University Libraries are providing a blend of online and controlled in-person services. Please see our website for more details.

Cragg, William, fl1818 - 1828 (petitioner to the Board of Longitude)

 Person

Found in 9 Collections and/or Records:

 Item

Letter from William Cragg to Andrew Aiken, 1819-06-16

Reference Code: GBR/0180/RGO 14/39: 55-59
Scope and Contents From the Item:

Eight letters from Cragg concerning his proposal for finding longitude by a ship's reckoning using a compass and charts, without the assistance of celestial lights or books of calculation. Includes charts for sailing [RGO 14/39: 53] and [RGO 14/39: 68v].

Dates: 1819-06-16
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).
 Item

Letter from William Cragg to Andrew Aiken, 1819-07-26

Reference Code: GBR/0180/RGO 14/39: 60-61
Scope and Contents

Concerning longitude and enclosing a chart.

Dates: 1819-07-26
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).
 Item

Letter from William Cragg to [Andrew Aiken], 1820-04-27

Reference Code: GBR/0180/RGO 14/39: 62-64
Scope and Contents

Concerning his theories on finding longitude.

Dates: 1820-04-27
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).
 Item

Letter from William Cragg to Dr Thomas Young, 1820-08-12

Reference Code: GBR/0180/RGO 14/39: 65-66
Scope and Contents

Originally enclosing papers on finding longitude.

Dates: 1820-08-12
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).
 Item

Letter from William Cragg to Dr Thomas Young, 1821-09-06

Reference Code: GBR/0180/RGO 14/39: 67-69
Scope and Contents

Outlining his proposals for finding longitude and enclosing a chart.
Note: folios 67-69 were originally bound in the wrong order and should be read 69, 67-68.

Dates: 1821-09-06
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).
 Item

Letter from William Cragg to Dr Thomas Young, 1828-05-20

Reference Code: GBR/0180/RGO 14/39: 72-72a
Scope and Contents

Proposing the use of a mechanical apparatus which could be 'affixed' to a ship to measure its progress, with the distance travelled then used to determine longitude.

Dates: 1828-05-20
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).
 Item

Letter from William Cragg to Lord Melville, 1818-08-10

Reference Code: GBR/0180/RGO 14/39: 53-54
Scope and Contents

Includes a chart to work out latitude or longitude at sea from any place.

Dates: 1818-08-10
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).
 Item

Letter from William Cragg to the Board of Longitude, 1821-09-07

Reference Code: GBR/0180/RGO 14/39: 70-71
Scope and Contents

Requesting permission to use the observatory at Greenwich.

Dates: 1821-09-07
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).
 Item

William Cragg on the cause of the variation of the magnetic needle, 1825 - 1828

Reference Code: GBR/0180/RGO 14/43: 476a-484
Scope and Contents From the File:

Correspondence regarding the effect of magnetic variation on the mariner's compass, the use of magnetic variation to establish longitude and the cause of magnetic variation.

Dates: 1825 - 1828
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).