Hall, , Asaph, III, 1829-1907
Found in 20 Collections and/or Records:
Early Work of the HCO under the Bond Adminstrations, 1848-1877, bulk: 1848-1866
Equatorial, 1858-11-11/1859-05-04 Digital
Meridian Circle, 1862-03-28/1862-05-07 Digital
Meridian Circle, 1862-05-07/1862-08-06 Digital
Sidereal and Mean Time Clocks, 1856-01-01/1857-02-27 Digital
Timings of chronometers and Mean Time clocks; notes on clock adjustments; Note of offer by Mr. Dodge to sell telegraph lines to the observatory
Sidereal and Mean Time Clocks, 1856-07-02/1857-02-27 Digital
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.
Sidereal and Mean Time Clocks, 1858-07-02/1860-07-16 Digital
Data relating to timing output of various clocks and chronometers.
Sidereal and Mean Time Clocks, 1860-07-16/1862-09-03 Digital
1860 July 17/18: "These chronometers were used for observing the solar eclipse. See Transit Book of this date."; "Corrections of the New Clock. (Isody. Escap.) [i.e., Isodynamic Escapement] Oct. 23 1860 to Apr. 8 1861; Timing data recorded for various devices; Cambridge and Boston