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Thanks for the information, and the offer of a scan.

But there's no urgency, just interest. Isis is available to me, both in the
library of the Museum for the History of Science, in Oxford, and in the
Bodleian. I'll add it to my long list of things to look at, next visit.

If there's evidence of any real astronomical determination of longitudes,
before 1500 (or even before the early 1600s), I  would be interested to
learn about it.

Ptolemy's Geographica arrived back in the West some time after 1400. We
discussed the Marseilles tables on the list a few months back, and as I
remember, these were stated as dating from 12th century, well before that
recall of Geographia, and contained many longitudes, some good ones and
some very bad ones. I have presumed these came from dead-reckoning of
travellers, in day's journeys, by land or sea, rather than by astronomy. Is
that wrong?

George.

contact George Huxtable, at  george@hux.me.uk
or at +44 1865 820222 (from UK, 01865 820222)
or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.
----- Original Message ----- 
From: "Apache Runner" 
To: 
Sent: Saturday, March 20, 2010 9:52 AM
Subject: [NavList] Re: AW: Early lunars


Wolfgang -

Yes on both accounts.

John H.

On Sat, Mar 20, 2010 at 5:30 AM, Wolfgang K�berer <
koeberer@navigationsgeschichte.de> wrote:

> This is the article, I presume:
>
> Wright, John Kirtland
> Notes on the knowledge of latitudes and longitudes in the Middle Ages.
> in: Isis, Vol.  5 (1923), 75 - 98.
>
> He has also written a book on "The geographical lore of the Time of the
> Crusades".
>
> I can bring along a copy of the article in May, George, or send a scan.
>
> Wolfgang
>
>
>
>
>

   

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