The Alethiometer

 The Alethiometer 

The alitheometer is a device that can answer any question it is asked. Only Lyre has the skill to read the Alethiometer. IT is a truth telling-machine wich was given to Lyre bye Lord Asriel, Lyre's uncle. Seratina tested Lyre by asking er to ask the Alethiometer who was her old lover.