Astronomical clocks -- United States.

Scope and Contents: This series contains astronomical observations and data calculations spanning the early history of the Harvard College Observatory from 1848 until 1877, though most materials date to the subsequent directorships of H.C.O. founder William Cranch Bond and then his son George Phillips Bond prior to his death 1866. Astronomers whose work is represented in this series include: William Cranch Bond, George Phillips Bond, Richard F. Bond, Benjamin Pierce, Charles W. Tuttle, Horace P....

Scope and Contents: This series contains astronomical observations and data calculations spanning the early history of the Harvard College Observatory from 1848 until 1877, though most materials date to the subsequent directorships of H.C.O. founder William Cranch Bond and then his son George Phillips Bond prior to his death 1866. Astronomers whose work is represented in this series include: William Cranch Bond, George Phillips Bond, Richard F. Bond, Benjamin Pierce, Charles W. Tuttle, Horace P....

Scope and Contents: This series contains astronomical observations and data calculations spanning the early history of the Harvard College Observatory from 1848 until 1877, though most materials date to the subsequent directorships of H.C.O. founder William Cranch Bond and then his son George Phillips Bond prior to his death 1866. Astronomers whose work is represented in this series include: William Cranch Bond, George Phillips Bond, Richard F. Bond, Benjamin Pierce, Charles W. Tuttle, Horace P....

Scope and Contents: This series contains astronomical observations, data calculations, and administrative notes from the beginning of Edward Pickering’s tenure as Director of the Harvard College Observatory with the bulk of the materials dating from 1870 to 1905. The notebooks in this series feature early efforts in variable star analysis and meridian circle work, including HCO efforts to contribute zone measurements to contemporary revisions of the Bonn Durchmusterung. Additional records in this series...

Scope and Contents: This series contains astronomical observations, data calculations, and administrative notes from the beginning of Edward Pickering’s tenure as Director of the Harvard College Observatory with the bulk of the materials dating from 1870 to 1905. The notebooks in this series feature early efforts in variable star analysis and meridian circle work, including HCO efforts to contribute zone measurements to contemporary revisions of the Bonn Durchmusterung. Additional records in this series...

Scope and Contents: This series contains astronomical observations, data calculations, and administrative notes from the beginning of Edward Pickering’s tenure as Director of the Harvard College Observatory with the bulk of the materials dating from 1870 to 1905. The notebooks in this series feature early efforts in variable star analysis and meridian circle work, including HCO efforts to contribute zone measurements to contemporary revisions of the Bonn Durchmusterung. Additional records in this series...

Scope and Contents: This series contains astronomical observations, data calculations, and administrative notes from the beginning of Edward Pickering’s tenure as Director of the Harvard College Observatory with the bulk of the materials dating from 1870 to 1905. The notebooks in this series feature early efforts in variable star analysis and meridian circle work, including HCO efforts to contribute zone measurements to contemporary revisions of the Bonn Durchmusterung. Additional records in this series...

Scope and Contents: This series contains astronomical observations, data calculations, and administrative notes from the beginning of Edward Pickering’s tenure as Director of the Harvard College Observatory with the bulk of the materials dating from 1870 to 1905. The notebooks in this series feature early efforts in variable star analysis and meridian circle work, including HCO efforts to contribute zone measurements to contemporary revisions of the Bonn Durchmusterung. Additional records in this series...

Scope and Contents: This series contains astronomical observations, data calculations, and administrative notes from the beginning of Edward Pickering’s tenure as Director of the Harvard College Observatory with the bulk of the materials dating from 1870 to 1905. The notebooks in this series feature early efforts in variable star analysis and meridian circle work, including HCO efforts to contribute zone measurements to contemporary revisions of the Bonn Durchmusterung. Additional records in this series...

Scope and Contents: This series contains astronomical observations, data calculations, and administrative notes from the beginning of Edward Pickering’s tenure as Director of the Harvard College Observatory with the bulk of the materials dating from 1870 to 1905. The notebooks in this series feature early efforts in variable star analysis and meridian circle work, including HCO efforts to contribute zone measurements to contemporary revisions of the Bonn Durchmusterung. Additional records in this series...

Scope and Contents: This series contains astronomical observations, data calculations, and administrative notes from the beginning of Edward Pickering’s tenure as Director of the Harvard College Observatory with the bulk of the materials dating from 1870 to 1905. The notebooks in this series feature early efforts in variable star analysis and meridian circle work, including HCO efforts to contribute zone measurements to contemporary revisions of the Bonn Durchmusterung. Additional records in this series...

Scope and Contents: This series contains astronomical observations, data calculations, and administrative notes from the beginning of Edward Pickering’s tenure as Director of the Harvard College Observatory with the bulk of the materials dating from 1870 to 1905. The notebooks in this series feature early efforts in variable star analysis and meridian circle work, including HCO efforts to contribute zone measurements to contemporary revisions of the Bonn Durchmusterung. Additional records in this series...

Scope and Contents: This series contains astronomical observations, data calculations, and administrative notes from the beginning of Edward Pickering’s tenure as Director of the Harvard College Observatory with the bulk of the materials dating from 1870 to 1905. The notebooks in this series feature early efforts in variable star analysis and meridian circle work, including HCO efforts to contribute zone measurements to contemporary revisions of the Bonn Durchmusterung. Additional records in this series...

Scope and Contents: This series contains astronomical observations, data calculations, and administrative notes from the beginning of Edward Pickering’s tenure as Director of the Harvard College Observatory with the bulk of the materials dating from 1870 to 1905. The notebooks in this series feature early efforts in variable star analysis and meridian circle work, including HCO efforts to contribute zone measurements to contemporary revisions of the Bonn Durchmusterung. Additional records in this series...

Overview: The Records of Harvard College Observatory Director George Phillips Bond, consisting of correspondence and subject files, manuscript drafts, and astronomical data, chiefly document the research activities of the Harvard College Observatory from 1859 to 1865. Chronicled are observations of planets, including Mars and Jupiter; efforts to determine the brightness of stars; and the detection of comets, eclipses, and other astronomical phenomena. George Phillips Bond (1825-1865), an astronomer,...

Overview: The Records of Harvard College Observatory Director William Cranch Bond document the founding, growth, and scientific research of the Harvard College Observatory primarily from 1840 to 1859. Also chronicled is the Observatory’s participation in advances made in astronomy, stellar photography, meteorology, continental exploration, and technological improvements in astronomical instruments in the early nineteenth century. William Cranch Bond (1789-1859), American astronomer and instrument...

Scope and Contents: This series contains astronomical observations and data calculations spanning the early history of the Harvard College Observatory from 1848 until 1877, though most materials date to the subsequent directorships of H.C.O. founder William Cranch Bond and then his son George Phillips Bond prior to his death 1866. Astronomers whose work is represented in this series include: William Cranch Bond, George Phillips Bond, Richard F. Bond, Benjamin Pierce, Charles W. Tuttle, Horace P....

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...

Scope and Contents:

Timings of chronometers and Mean Time clocks; notes on clock adjustments; Note of offer by Mr. Dodge to sell telegraph lines to the observatory

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.

Scope and Contents:

Data relating to timing output of various clocks and chronometers.

Scope and Contents:

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

Scope and Contents:

Directions for Absolute Time; Brief Ephemeris for locally-viewed stars for May 1865; Eclipse of Sun - End West Wing Equatorial; Timing output data and status information relating to a number of chronometric devices

Scope and Contents: This series contains astronomical observations, data calculations, and administrative notes from the beginning of Edward Pickering’s tenure as Director of the Harvard College Observatory with the bulk of the materials dating from 1870 to 1905. The notebooks in this series feature early efforts in variable star analysis and meridian circle work, including HCO efforts to contribute zone measurements to contemporary revisions of the Bonn Durchmusterung. Additional records in this series...

Scope and Contents: This series contains astronomical observations, data calculations, and administrative notes from the beginning of Edward Pickering’s tenure as Director of the Harvard College Observatory with the bulk of the materials dating from 1870 to 1905. The notebooks in this series feature early efforts in variable star analysis and meridian circle work, including HCO efforts to contribute zone measurements to contemporary revisions of the Bonn Durchmusterung. Additional records in this series...