Example tags/facts

Filar telescope micrometer made by Merz and Sons.

Astronomical instrument, filar telescope micrometer, brass / glass, used at Sydney Observatory, made by Merz and Sons, Germany, 1860-1878. A filar micrometer for use in conjunction with a telescope to make precise measurements. The filar micrometer is mounted on a graduated circle. A screw gauge at the top of the instrument turns a wheel with a graduated scale engraved into its surface. Below this is another screw gauge that moves a brass plate up and down. In the centre of the brass plate is the eyepiece for the micrometer. On the other side of the micrometer is a circular brass aperture that has been painted black. This can be removed to reveal a series of flat mirrors covering the conical shaped inside of the instrument. There is a hole with a screw fitting in the middle of the aperture.

View object on the British Library on Flickr Commons site (opens in new window).

(Accession num: H10006)

So far people have added content in 4 turns about this object.


dials, two, measurement, brass, Telescope, astronomy, brass, micrometer, Merz and Sons, Filar, measurement, instrument, glass, micrometer

You can also view a list of objects with added facts (not just tags).

  • Your score for this game:

    • No points for this game yet. Start playing to earn points
    Login or register to save your points
  • Objects you've played in this game

    So far players like you have improved 989 records for 3 museums and libraries through games on this site.
  • Top registered players (all games)

    • Han (5620 points)
    • Josie (5000 points)
    • lrnc (4400 points)
    • mia (4005 points)
    • Hepburn (2190 points)
    • ad (1785 points)
    • archiwicz (1225 points)
    • miathepink (1115 points)
    • JoK (890 points)
    • jennifuchs (870 points)
  • Register or login to save your points

  • Help the British Library tag a million images

    Some of the million images the British Library have released on Flickr Commons have been added here for you to play with. The tags you add will help people find these historic images.

    They have asked people to use these special tags where appropriate: 'map', 'letter'+theletter e.g. LetterA, 'architecture', 'decoration', 'landscape', 'music', 'portrait', 'fashion'. If the image needs rotating, add 'rotatec' or 'rotatecounterc'.

    More information on British Library tagging guidelines

  • Coming soon – top recent players

    I want to celebrate people who've just started playing so I'll add a widget to show off the latest contributions.