Skip to main content
ITEM — Box: 4 Identifier: KG11365-6, phaedra0148

Sidereal and Mean Time Clocks, 1856-07-02/1857-02-27 Digital

Scope and Contents

Questions propounded by Mr Briggs, relative to his clock with a circulating pendulum; Comparison of sidereal clock with that containing Briggs patent circulating pendulum; recorded chronometer timings; Lieut. Ives set up his transit instrument on the stand of our variation-transit and obtained the following y E.C. and the Spring-governor.; Result, time to be given 4 1/2 seconds sooner at Cambridge than the bells at Boston should strike.


  • 1856-07-02/1857-02-27



120 cubic feet (120 boxes)
2531 Volumes

KG Number:


Sequence volume:


Repository Details

Part of the Wolbach Archives, Wolbach Library, Harvard University Repository

Harvard-Smithsonian Center for Astrophysics
60 Garden Street
Cambridge MA 02138 United States