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Time -- Systems and standards -- United States.

 Subject
Subject Source: Library of Congress Subject Headings

Found in 19 Collections and/or Records:

Records of the Harvard College Observatory Time Service

FOUND IN: Harvard University Archives
Sub-Fonds Identifier: UAV 630.377
Overview: In 1872, under Director Joseph Winlock, the Harvard College Observatory established the world’s first public time service, which it provided as a commercial service until 1892. The Observatory sold its time service to railroads and businesses by sending hourly signals over Boston’s fire alarm system and distributing time across the region via Western Union telegraph lines; this work eventually resulted in the establishment of the country's first time zone. The Records of the Harvard College...

Time book, 1875 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings / File: Time Book
Item — Box 74Identifier: KG11365-6, phaedra1785
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...

Time book, 1874 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings / File: Time Book
Item — Box 74Identifier: KG11365-6, phaedra1786
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...

Time book, 1874 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings / File: Time Book
Item — Box 74Identifier: KG11365-6, phaedra1787
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...

Time book, 1874 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings / File: Time Book
Item — Box 74Identifier: KG11365-6, phaedra1788
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...

Time Service, 1885/1886 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings
Item — Box 77Identifier: KG11365-6, phaedra1845
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...

Time Service, 1888/1890 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings / File: Time Service
Item — Box 75Identifier: KG11365-6, phaedra1791
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...

Time Service, 1890/1891 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings / File: Time Service
Item — Box 75Identifier: KG11365-6, phaedra1792
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...

Time Service, 1891 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings / File: Time Service
Item — Box 75Identifier: KG11365-6, phaedra1793
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...

Time Service, 1882/1883 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings / File: Time Service
Item — Box 75Identifier: KG11365-6, phaedra1802
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...

Time Service, 1892/1894 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings / File: Time Service
Item — Box 75Identifier: KG11365-6, phaedra1803
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...

Time Service, 1880 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings / File: Time Service
Item — Box 75Identifier: KG11365-6, phaedra1804
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...

Time Service, 1887/1888 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings / File: Time Service
Item — Box 75Identifier: KG11365-6, phaedra1801
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...

Time Service and Russian Transit, 1877 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings
Item — Box 75Identifier: KG11365-6, phaedra1794
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...

Time Service, Clock Comparison, 1881 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings
Item — Box 75Identifier: KG11365-6, phaedra1799
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...

Time Service Clock Comparisons, 1879/1880 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings
Item — Box 75Identifier: KG11365-6, phaedra1805
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...

Time Service Clock Comparisons, 1878/1879 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings
Item — Box 75Identifier: KG11365-6, phaedra1806
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...

Time Service, Clock Errors and Russian Transit, 1877 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings
Item — Box 75Identifier: KG11365-6, phaedra1797
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...

Time Service, Clock Errors and Russian Transit, 1877 Digital

FOUND IN: Wolbach Archives, Wolbach Library, Harvard University / Collection: Harvard College Observatory observations, logs, instrument readings, and calculations / Series: Variable Stars, Meridian Circle Work, and The Beginning of the Pickering Administration / File: Time Service, Clock Errors, and Other Instrument Readings
Item — Box 75Identifier: KG11365-6, phaedra1798
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...
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