Re: An equation wristwatch for the discerning dialist?
Hi Group, This particular Caliber 89 is, as we mentioned, currently available for purchase, from Christie's New York; price has been set at $11,000,000. Link: https://www.hodinkee.com/articles/a-patek-philippe-caliber-89-for-sale-at-christies-new-york Ray On 3/25/17, Robert Terwilliger <b...@twigsdigs.com> wrote: > I found a wristwatch that indicates the eot on a scale that (presumably) > can > be read to a fraction of a minute. The scale goes halfway around the > circumference of the dial. > > Go to this page: > > > > http://farlang.com/watches > > > > and scroll down to > > > > Audemars Piguet Jules Audemars > > > > The first illustration shows the movement with the kidney piece at the > lower > right. The third illustration shows the dial - which is difficult to read > on > the page - see the attached. The accuracy of the kidney piece will > determine > the accuracy of the reading. > > > > Bob > > > > --- https://lists.uni-koeln.de/mailman/listinfo/sundial
RE: The thread being discussed Equation of TimeRE: New Question The link has a real nice representation EOT
HI Group, The link in the message from clar...@aol.com below has this link on the page also An Intrinsic Representation of the Equation of Time - 2014-2017 - a .pdf file. This example is for Greenwich - contact me (ke...@karney.com) for a version for your own locality and the Nodebox 1.9.7 python code - Flame EoT.py I would like to include the graph of EOT in a sundial I did email the author above and was wondering if perhaps the mathematics behind it had been included in a Delta Cad Marco I could make use of. I hope the author Kevin Karney does reply with the graph. Ray Rochester NY USA N043.18550, W077.59415 From: clar...@aol.com To: rkell...@comcast.net, sundial@uni-koeln.de Cc: Date: Fri, 27 Jan 2017 12:13:05 -0500 Subject: Re: Looking for minutes and seconds correction for whole year, for Equation of Time plaque Thanks Bob and everyone else for their input. The EQT really does change way into the future. I am leaning towards Kevin Karney website: http://www.precisedirections.co.uk/Sundials/index.html using a “Victorian EOT” table adding or subtracting minutes. I could set it into the future 2050 and after that I am sure I will not be around or if the sundial is still standing. Thanks, Ken Clark Elizabethtown, PA --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Gnomon of Saint-Sulpice
Hi Roger, For anyone interested I found this information on "From Wikipedia, the free encyclopedia" about to Sundial at the church with some more pic's please scroll to the bottom under Gnomon. https://en.wikipedia.org/wiki/Church_of_Saint-Sulpice,_Paris Ray On 4/3/16, Roger W. Sinnott <roger.sinn...@verizon.net> wrote: > Dan, > > > > I’m just guessing, but maybe the two holes and two spots are placed so that, > no matter what the Sun’s declination is, at least one of the spots will fall > on a smooth, uncluttered part of the floor. > > > > Roger > > > > > > From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Dan-George > Uza > Sent: Sunday, April 03, 2016 3:23 PM > To: sundial@uni-koeln.de > Subject: Gnomon of Saint-Sulpice > > > > Hello, > > > > Last week I visited the meridian line of Saint-Sulpice in Paris which dates > back to 1743. After the French Revolution the Republicans chiseled out all > references to royalty from the inscriptions. I don't know why but they also > erased some of the zodiac signs. Could it have something to do with the new > Republican Calendar? Also, there are two holes for the light to enter with > two spots forming on the ground and I don't understand exactly why... > > > > Dan Uza > > --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Metal cone
Hi Roger, I did a search for NASS Compendium 14-2 Hollander Dial Software; unfortunately the link to find a DeltaCAD marco was not available or I missed it, or perhaps you have to be a member of the North American Sundial Society to access it. Do you have a direct link to the Marco for the Hollander Sun Dial?; I am also interested in making one. Thank you, Ray N043., W077. flowercity14...@gmail.com On 8/18/15, Roger Bailey rtbai...@telus.net wrote: Hi Dan, As you consider conical gnomons, pay attention to the conical sundials of Hendrik Hollander, the winner of the 2006 Sawyer Award. His conical bi-gnomon sundials could tell clock time. Here is the note on his award. The 2006 Sawyer Dialing Prize has been awarded to Hendrik Hollander for his innovative design of a mean-time planar sundial with oblique conical gnomon and modified hour lines and day curves – resulting in a sundial adapted to modern timekeeping while retaining the aesthetic appeal of the familiar dial face. Google his name and sundials to see what his conical sundials can do. A link to this article published in the NASS Compendium 13-3 will come up. Also check the digital bonus with NASS Compendium 14-2 Hollander Dial Software. Regards, Roger Bailey NASS Secretary From: Dan Uza Sent: Saturday, August 15, 2015 11:16 AM To: sundial@uni-koeln.de Subject: Metal cone Hello all ! Any idea how much a metal cone would cost and where to buy it online? The kind you can use as gnomon - Ebay has loads of punk spikes on offer, but they are too small. Thanks! Dan Uza --- https://lists.uni-koeln.de/mailman/listinfo/sundial No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.6086 / Virus Database: 4392/10442 - Release Date: 08/15/15 --- https://lists.uni-koeln.de/mailman/listinfo/sundial
In The Interest of Science . . .
Gentlemen, Gentlemen; Please let's stop the name calling and labeling. We are all scientists to some degree as the word itself means knowledge. All of us have made mis-calculations, mis-judgements and plain old downright mistakes. In the true interest of science itself, and in that truest of spirit, let's just get on and not look back at such unproductive treatment of colleagues. Always remember Galileo. Just a thought from an ardent lurker, and avid reader. Thanks for letting me vent. Best Regards, Respectfully to All: --- Ray Ray Mutzel, The PC Doc [EMAIL PROTECTED] We . . . are not the central purpose of the Cosmos - from CONTACT Dr. Carl Sagan (1934 - 1996) PC-ERICQ #: 1465790 Lancaster, PA - USA40 04 03 N ~ 76 30 80 W @ 123m
Re: in the meantime
x-richAt 8:43 AM -0400 8/17/98, Uncle John wrote: SNIP Thanks for the responses to my earlier question about Hc. I'm trying to teach a friend minimal navigation. For a chronograph we're using GPS. John: You DO mean underlineChronometer,/underline don't you? underline /underlineA Chronograph is an event timing and recording watch. John Harrison never owned one! Ray Ray Bates, MBHI, Pres. The British Clockmaker, Inc. P.O. Box 102, 49 West Street Newfane, VT 05345 USA Specialists in the restoration of Antique Clocks, Marine Chronometers, Precision Regulators, and Automata. http://www.thebritishclockmaker.com /x-rich
Re: Dialing Scales
At 8:11 PM -0400 4/24/98, Tom Mchugh wrote: Dear All, A wealth of information on sundial practice, circa 1820 can be found in: Rees's Clocks Watches and Chronometers (1819-20), Snip and is accompanied by 42 illustrative figures on 4 pages of plates, pp 177 through 180. Gentlemen: I have this book and will scan the illustrated figures and forward them as attachments to anyone who requests them. I've scanned and printed out one page and it is very clear. For this use, and with such old material, I don't think there is any issue of copyright infringement. Ray Ray Bates, MBHI, Pres. The British Clockmaker, Inc. P.O. Box 102, West Street Newfane, VT 05345 USA http://www.thebritishclockmaker.com
Re: Subject: Silvering Mirrors - a non-sundial request
At 1:57 AM + 4/20/98, Tony Moss wrote: Fellow Shadow Watchers, A slightly off-topic request but I know there are many list members with an astronomical interest. Many years ago I silvered my home made telescope mirror using a recipe containing silver nitrate and sugar I seem to remember. It was called 'Brayshear's Process' or something similar? They use more durable aluminium for this purpose these days so it isn't mentioned in anything printed more recently. SNIP Tony: The closest I can come up with for a silvering recipe is that used by us in the antique clock restoration business, but that is for use on brass. I've never heard of the use of sugar. Could you be thinking of salt? To silver brass, as in clock dial chapter rings (or astrolabes, etc.), the silver nitrate is converted to silver chloride by combining it with salt and cream of tartar to make a paste which is applied to the brass by rubbing, following preparation of the surface by rubbing it with salt. If you or anyone else wants the formula I'll be happy to provide it. Early looking glass mirrors used, I think, mercury which might also work for you. In order to increase the contrast of old sundials preparatory to photographing them they can be silvered temporarily, then cleaned off to their original state following the photography session. (That keeps me on-topic!) Ray Ray Bates, MBHI, Pres. The British Clockmaker, Inc. P.O. Box 102, West Street Newfane, VT 05345 USA http://www.thebritishclockmaker.com
