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.

Royal Observatory, Greenwich


Found in 1 Collection or Record:


Airy's Transit Circle: observation and reduction ledgers and associated papers, 1850 - 1982

Reference Code: GBR/0180/RGO 126
Scope and Contents

The items in this collection are both bound and unbound sets of the pre-printed forms which were used to record measurements of the transits of objects across the Greenwich Meridian and thus allow the accurate calculation of their position. Observations made on the Airy and Cooke Reversible Transit Circles were treated by the observers as a continuous sequence and the forms in later volumes are generally headed "Cooke Reversible Transit Circle".

Dates: 1850 - 1982
Conditions Governing Access: N.B. Some volumes series /1 and series /4 should be ordered 48 hours in advance due to their poor physical condition. Please see individual entries for details.