Was the article in cuneiform or on papyrus, and thus possibly have been
dropped on the kitchen floor and smashed, or eaten by the cat?
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-----Original Message-----
From: Jones, David (Library) [mailto:[log in to unmask]]
Sent: 13 May 2004 15:00
To: [log in to unmask]
Subject: Re: Frank Debenham article?
I recall seeing an article which indicated that the ancient Egyptians used
such a device. I have no idea where or when that was published.
David
David L. Jones, Map Librarian
William C. Wonders Map Collection
Science & Technology Library
1-26 Cameron Library
University of Alberta
Edmonton, Alberta, Canada T6G 2J8
voice (780)492-3433 fax (780)492-2721
e-mail [log in to unmask]
-----Original Message-----
From: Anne Taylor [mailto:[log in to unmask]]
Sent: Thursday, May 13, 2004 7:17 AM
To: [log in to unmask]
Subject: Re: Frank Debenham article?
Dear all
Thanks for your help on this one. Apparently this is called 'hydrostatic
levelling' and is a well established technique that has been used in
nuclear power plants, to level Dutch canals and to measure the tidal
tilting of floating ice.
Thanks again
Anne
At 11:08 13/05/2004, Anne Taylor wrote:
>Dear All
>I'm in correspondence with someone who is writing about his time as a
>surveyor during and after WWII. He has asked if Frank Debenham ever wrote
>about the surveying/levelling technique outlined in the message below. I've
>looked in Debenham's books 'Excercises in cartography' and 'Map Making' and
>a colleague in the Department of Geography at Cambridge has looked through
>their collection of Debenham articles - but without success.
>Does anyone know of a reference to this technique - by Debenham, or anyone
>else?
>Many thanks
>Anne
>
>
>>Dear Anne,
>>
>>Here I am still pegging away and peering into my dim and (literally)
>>distant past!
>>
>>One small incident I have just remembered was the visit to the Survey
>>Department in Khartoum by a Prof. Frank Debenham a well known Cambridge
>>geographer.
>>
>>He was demonstrating a levelling device which consisted of a long plastic
>>tube connected at both ends to a graduated glass tube about six feet long
>>attached to a wooden staves.
>>
>>In operation you filled the device with a suitable quntity of water and
>>then by holding the staves vertically you had a levelling device which
>>could be used through (say) thick bush where normal levelling using a
>>spirit level was unsuitable.
>>
>>I never heard of this device again but I suspect that it was probably
>>written up at the time. Any chance of finding a reference to it?
>>
>>With best wishes,
>>
>>Bill Saunders
>
>Anne Taylor
>Head of Map Department, Cambridge University Library, West Road, Cambridge
>CB3 9DR
>Tel: 01223-333041. Fax: 01223-333160. email: [log in to unmask]
>http://www.lib.cam.ac.uk/maps/Home.htm
Anne Taylor
Head of Map Department, Cambridge University Library, West Road, Cambridge
CB3 9DR
Tel: 01223-333041. Fax: 01223-333160. email: [log in to unmask]
http://www.lib.cam.ac.uk/maps/Home.htm
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