RECORDS: 1 - 20 of 20
Early Work of the HCO under the Bond Adminstrations, 1848-1877, bulk: 1848-1866
Series Identifier: KG11365-6Equatorial, 1858-11-11/1859-05-04 Digital
Item — Box 5Identifier: KG11365-6, phaedra0183Meridian Circle, 1862-03-28/1862-05-07 Digital
Item — Box 1Identifier: KG11365-6, phaedra0038Meridian Circle, 1862-05-07/1862-08-06 Digital
Item — Box 1Identifier: KG11365-6, phaedra0039Sidereal and Mean Time Clocks, 1856-01-01/1857-02-27 Digital
Item — Box 4Identifier: KG11365-6, phaedra0147Timings 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
Item — Box 4Identifier: KG11365-6, phaedra0148Questions 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
Item — Box 4Identifier: KG11365-6, phaedra0149Data relating to timing output of various clocks and chronometers.
Sidereal and Mean Time Clocks, 1860-07-16/1862-09-03 Digital
Item — Box 4Identifier: KG11365-6, phaedra01501860 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
Transit Circle, 1857-11-03/1858-02-10 Digital
Item — Box 1Identifier: KG11365-6, phaedra0028Transit Circle, 1858-02-10/1858-07-05 Digital
Item — Box 1Identifier: KG11365-6, phaedra0029Transit Circle, 1858-07-05/1859-01-24 Digital
Item — Box 1Identifier: KG11365-6, phaedra0030Transit Circle, 1859-01-24/1859-08-17 Digital
Item — Box 1Identifier: KG11365-6, phaedra0031Transit Circle, 1859-08-17/1860-01-23 Digital
Item — Box 1Identifier: KG11365-6, phaedra0032Transit Circle, 1860-11-29/1861-03-21 Digital
Item — Box 1Identifier: KG11365-6, phaedra0035Transit Circle, 1861-03-21/1861-10-01 Digital
Item — Box 1Identifier: KG11365-6, phaedra0036Transit Circle, 1861-10-01/1862-03-28 Digital
Item — Box 1Identifier: KG11365-6, phaedra0037Transit Circle, 1857-09-21/1857-11-03 Digital
Item — Box 1Identifier: KG11365-6, phaedra0027Transit Circle, New Group of Five wires, 1857-02-17/1857-09-21 Digital
Item — Box 1Identifier: KG11365-6, phaedra0026Transit Instrument, 1860-01-23/1860-06-23 Digital
Item — Box 1Identifier: KG11365-6, phaedra0033Transit Instrument, 1860-06-23/1860-11-29 Digital
Item — Box 1Identifier: KG11365-6, phaedra0034REFINE MY RESULTS:
- Subject
- Astronomical clocks -- United States. 4
- Astronomical instruments -- Design and construction. 2
- Names
- Tuttle, Horace Parnell, 1837-1923 12
- Bond, George Phillips, 1825-1865. 11
- Coolidge, Philip Sidney, 1830-1863 8
- Safford, Truman Henry, 1836-1901 7
- Bond, William Cranch, 1789-1859 5
- Bond, Richard Fifield, 1827-1866 3
- Harvard College Observatory 1
- Langley, S. P. (Samuel Pierpont), 1834-1906 1
- Pierce, Benjamin. 1
- Rogers, William A. (William Augustus), 1832-1898 1
- Searle, G. M. (George Mary), 1839-1918 1
- Trouvelot, E. L. (Etienne Leopold), 1827-1895 1
- Tuttle, Charles Wesley, 1829-1881 1
- Winlock, Joseph, 1826-1875 1 ∧ less