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Observations and calculations, 1742 - 1757

 File
Reference Code: GBR/0180/RGO 3/43/5

Scope and Contents

Observations and calculations of eclipses.

1. Mathematical equation to find the relative position of the Sun and Moon, with sketches and calculations.

2. Rule and equation concerning the Sun's declination.

3. Observation of an eclipse, 14 July 1748, and calculations relating to that observation.

4. Adjustments to the line of collimation, 1745, giving great detail of the procedure employed.

5. Improvements in illuminating the wires of the quadrant and transit telescopes by Bradley, together with other general alterations, c. 1742.

6. Invitation to attend the Royal Society, 20 June 1757, with calculations on the reverse.

7. Calculations and observations made in establishing distances between the meridians of Sherborne and Oxford from Greenwich, 6 June 1744.

8. Observations of Jupiter and Mercury, 30 October 1744.

9. Observations of the Pole Star, 1745-1746.

10. Observations of Jupiter and Mars made at Oxford, 21 May 1743.

11. Column of monthly figures, 1744-1748, of unknown purpose.

12. Column of figures for 'The Difference in time for 13 1/3 in Azimuth', undated.

13. Tables for reducing 96/90 of quadrant to degrees, 1750-1755.

14. Transit of zenith observations southwards, 1751-1752.

15. Rough calculations.

16. Computation of the Sun's error in right ascension, September 1749.

17. Transit observations, 1754.

18. Lunar observations, 9 October 1747.

19. North polar distances, 1754.

20. Transit observations, 1752.

21. Computation of the Sun's passage for transit observations.

22. Part of a letter from Francis Rowden concerning the building of an observatory, with calculations.

22. Transit observations, 1743-1746, to establish the zenith.

23. Bill for food, 1743-1744.

24. Table of stars passing through threads of the transit instrument, undated.

25. Quadrant observations, 1743.

26. Measurements of the Sun by clocks, 1743-1744.

27. Quadrant observations, 1743-1745.

28. Tables relating to the zenith, 1743.

29. Observations of stars, 1744-1748, with irregular daily intervals between recorded observations.

30. Table of zenith distances and errors, 1742.

31. Mean differences in right ascension between Orion and Aquila, 1 January 1743.

32. Positions of major stars, 1743.

33. Observations of stars at regular daily intervals, 1743-1748.



































































Dates

  • Creation: 1742 - 1757

Creator

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).

Extent

61 folio(s)

Language of Materials

English

Finding aid date

2005-11-03 14:13:35+00:00

Includes index.

Subject

Repository Details

Part of the Cambridge University Library Repository

Contact:
Cambridge University Library
West Road
Cambridge CB3 9DR United Kingdom