Dear Alistair, I am glad you appreciate the effort we invested in saving the English version of Fer's legacy. Transmitting the original 360 Dutch articles from Fer's html-version into the CMS of our present website was quite a job. Repeating that for the 360 English articles (skillfully translated by our secretary Ruud Hooijenga) was beyond our stamina. The present solution, keeping the English html-files and linking to the database for the figures, appears to be a workable compromise.
It might be interesting for the list members that the English summaries of the articles in our Bulletin from 1998 onward and its successor Zon & Tijd, are also available from the English section of our website, www.zonnewijzerkring.nl, via the link Journal Contents. As far as I know, Fer has not dealt with the construction of Bab. & Ital. hour lines in a concave saucer. Best regards, Frans Maes <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Virusvrij. www.avg.com <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> <#m_4580214482277915561_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Mon, Sep 7, 2020 at 3:44 PM Alastair & Sheila <a...@3peel.co.uk> wrote: > Hello Frans > > > > Your link to all the articles of Fer’s Legacy is wonderful. Thank you very > much for telling us about it. I had already seen a copy of his article > "Construction of hemispherium", showing how to generate Babylonian and > Italian hour lines in a hemisphere bowl. Do you know if he described a > method for doing the same lines in a spherical concave saucer, not a bowl, > like the diptych dials by Reinman of Nuremberg and others? There must have > been a method that worked, or was it custom and practice perhaps. > > > > Good wishes > > > > Alastair Hunter > > ______________________________________________________________ > > Macmillan Hunter Sundials, 3 Peel Terrace, Edinburgh EH9 2AY, Scotland, UK > Telephone: 44 0 131 468 2616 Email: sundi...@macmillanhunter.co.uk > > Website: https://www.macmillanhunter.co.uk/ > ______________________________________________________________ > > > > *From:* sundial <sundial-boun...@uni-koeln.de> *On Behalf Of *Maes, F.W. > *Sent:* 03 September 2020 13:49 > *To:* siegfried.netzb...@t-online.de > *Cc:* sundial@uni-koeln.de > *Subject:* Re: Fake "trifilar" Sun Dial? > > > > Dear Siegfried, > > > > Bernard Rouxel of France designed this original sundial. > It got him second prize in the Italian "Le ombre del Tempo” contest of > 2008. > > > > It was discussed by the late Fer de Vries in one of his online articles. > > That website does not exist anymore, but you can find his articles in > "Fer's legacy": > > - Go to www.zonnewijzerkring.nl > > - Click the English flag > > - Click "Downloads" > > - At the bottom of the page, download the zip-file and unzip > > - Open "FersLegacy.html" > > The article is in the section "Article of the Month", November 2009. > > Enjoy! > > > > Best regards, > > Frans Maes > > > > > > > > On Thu, Sep 3, 2020 at 10:34 AM Siegfried Netzband < > siegfried.netzb...@t-online.de> wrote: > > Dear sundialists, > > found the attached picture in an old archive and do not have any details > about it. > > The dial shown seems to be somethig like a "bifilar sundial with three > straight wires". The wires obviously do not touch one another. The picture > was taken at the moment when all wire shadows cross in one point on the > dial face suggesting that the sundial shows the time at that moment (and > any other?). There is no dial face visible. What kind of sun dial is that - > what could be the idea behind it and it´s purpose? > > Is there anyboddy out threre who could answer the following questions and > can help me to solve my problem, i.e. clarify that sun dial: > > - Has any one seen that picture before? If so, do you have any details > about it? Please let me know. > > - The originator of that sun dial must have had some very special ideas > when constructing that sun dial. To the best of my knowledge a picture like > that where the shadows of three wires which do not touch one another, > mounted at different heights and angles across the face of the dial, cross > in one point on the face of the dial, can only be taken at at most 2 times > a year, each time at exactly the same solar time. Am I right or does there > realy exist something like a "trifilar sundial" as shown in the picture > idicating time over the year? > > - Taking the sun dial shown to a singular, simplistic extreme: At whatever > angles or hights multiple wires might run across a dial and touch each > other at their crrossing point, the dial would simply work and could be > calculated taking the crossing / touching point as the tip of the gnomon, > the node of the dial. Correct? > > - Does any one know wether H. Michnik, the inventor of the bifilar sun > dial and its theory in 1923, has made any mathematical statement about > "multifilar sundails"? > > Thank you for your help and > > Kind Regards > > Siegfried > > > > > > Siegfried Netzband > > Hebelstr. 12 > > 75233 Tiefenbronn > > Tel: 07234 2802 > > Fax: 07234 942909 > > Mob: 0151 53083636 / 0160 1531634 > > E-Post: siegfried.netzb...@epost.de > > Skype: siegfried75233 > > www.ferienhaus-frieseneck.de > > > > > > > > > > > > > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Virusvrij. www.avg.com <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
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