"Peter Alaca" <P.Alaca@xxxxxx> wrote in message
> Vaughan Sanders wrote: news:e69nbe$mi5$1$8300dec7@xxxxxxxxxxxxxxxx
>> "IE J" wrote
>>> you are correct in your assumptions re. sunstone.
>>> But the sunstone that was the Viking one was even better. It didn't
>>> at all look or work the way the so called sunstone did. Both are
>>> very good equipment to measure exact position.
>> Experiments with Icelandic "felspar" have proved that the solarsteinn
>> does not work, also literary scholars agree that reference to
>> "solarsteinar" only appear after 1200 and probably refer to a burning
>> glass and not a navigational instrument.
>> They could have just had a magnetic compass, the Chinese had been
>> using them for the previous 1000 years or so.
> Are this the solarteinar?
Yes I think so, it was claimed that these prisms could see through fog and
cloud so allowing the Norse mariner to get a position.