What a hoot. Thanks for putting those photos on the internet. It works like a ring dial on steroids. Very cool.
-Bill G. ----- Original Message ----- From: "fer de vries" <[EMAIL PROTECTED]> To: "J. Tallman" <[EMAIL PROTECTED]>; "Sundial List" <[EMAIL PROTECTED]> Sent: Sunday, October 14, 2007 11:11 AM Subject: Re: Non-terrestrial sundials > Jim and others, > > I know about a sundial on board of a passengers ship. > I posses a photo-copy of small booklet about the dial and its use. > > The ship is the MS Oranje, built in 1938/39. > About the ship and her history have a look at: > www.ssmaritime.com/oranje.htm > > The ship ended her life in 1979 as Angelina Laouro, when it sunk. > > > On board of MS Oranje was a sundial. > The priciple is based on the "universal ring dial" although it is > constructed as a "cresent dial". > The dial was set to the latitude, the cresent was set to the date. > With knobs the dial could be placed level. > The foot of the dial was on a compass with a scale of 360 degrees. > Turn the dial until the shadow of the endpoint of the cresent falls on the > central line of > the hourscale. > The dial then is north-south oriented and the time and azimut of the > ship's > course could be read. > The time's scale was for local suntime. > > I don't know if the instrument was placed on a cardanic support like is > seen > in Mayall page 153, mentioned by Peter Mayer. > > The dial wasn't meant as an instrument for the sailors but for the > passengers to "play" with and wonder about the relations of the course of > the sun, of the ship and the time. > > The dial was designed by W.G. ten Houte de Lange, adjunct director of the > Zeiss planetarium in The Hague, now not longer excisting. > > He also wrote the booklet about the dial in or around 1939. > > Two black and white photos from the booklet are temporaly placed at: > > http://www.de-zonnewijzerkring.nl/tijdelijk/photos.htm > > > Best wishes, Fer. > > > Fer J. de Vries > > De Zonnewijzerkring > http://www.de-zonnewijzerkring.nl > > Molens > http://www.collsemolen.dse.nl > > Eindhoven, Netherlands > lat. 51:30 N long. 5:30 E > > ----- Original Message ----- > From: "J. Tallman" <[EMAIL PROTECTED]> > To: "Sundial List" <[EMAIL PROTECTED]> > Sent: Saturday, October 13, 2007 4:16 PM > Subject: Non-terrestrial sundials > > >> Hello All, >> >> Has anyone ever seen a sundial specifically designed for use on a boat >> or ship? >> >> I realize that there are obvious issues re: movement and variable >> location, but I thought it might be an interesting question for the list >> to consider from the historical perspective... >> >> >> Best, >> >> Jim Tallman >> www.artisanindustrials.com >> [EMAIL PROTECTED] >> >> --------------------------------------------------- >> https://lists.uni-koeln.de/mailman/listinfo/sundial >> > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
