Drawer 5 PC 2: RGO 101
Container
Contains 1 Result:
Sub-Series
Photographic Zenith Tube Drawings, 1947 - 1959
Sub-Series
Reference Code: GBR/0180/RGO 101/3/4
Scope and Contents
The Photographic Zenith Tube (PZT) was designed and constructed to improve the accuracy of time-determination. It was also used at the Observatory for variation of latitude measurements. Operations with the PZT began in 1955 and ceased on 30 June 1984. The series includes three sets of drawings: blueprints of the U.S. Naval Observatory, Washington's Photographic Zenith Tube; a large set of design drawings for the RGO PZT by Sir Howard Grubb-Parsons and Co. Optical Works; and a set of...
Dates:
1947 - 1959
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).