Astronomical clocks -- United States.
Subject
Subject Source: Library of Congress Subject Headings
Found in 2 Collections and/or Records:
Sidereal and Mean Time Clocks, 1856-01-01/1856-04-21 Digital
FOUND IN:
Wolbach Archives, Wolbach Library, Harvard University
/
Collection:
Harvard College Observatory observations, logs, instrument readings, and calculations
/
Series:
Early Work of the HCO under the Bond Adminstrations
/
File:
G1-8, also Ga, Gb: Relating to Clocks and Chronometers
Item — Box 4Identifier: KG11365-6, phaedra0146
Scope and Contents:
Comparisons by 12MT- Comparators -1107 and 1508; Comparison of chronometers with MTC - by aid of 6hr; Comparisons with comparator No. 1508; 1855 June 5th Last comparison before embarcation; Direct comparisons; Comparison of chronometer Thomas Adams No 3585;Comparator Y (No. 1107 -)(copied from the paper found in the top); Sidereal Chronometer No. 3585; Errors of Chronometers on Greenwich M.S.T.; Notes documenting return of specific chronometers following examination; Direct comparison of...
Sidereal and Mean Time Clocks, 1856-07-02/1857-02-27 Digital
FOUND IN:
Wolbach Archives, Wolbach Library, Harvard University
/
Collection:
Harvard College Observatory observations, logs, instrument readings, and calculations
/
Series:
Early Work of the HCO under the Bond Adminstrations
/
File:
G1-8, also Ga, Gb: Relating to Clocks and Chronometers
Item — Box 4Identifier: KG11365-6, phaedra0148
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.