Dear Karlheinz, I am very interested on the subject "fist sundials with the gnomons parallel to the polar axis" and for this reason I ask you where I can find other information on this matter or also some photo of the Roman sundials of this kind. Thanks you very much Gianni Ferrari
>-- Messaggio originale -- >From: [EMAIL PROTECTED] >Date: Thu, 14 Jul 2005 06:55:36 EDT >Subject: Re: Armillary Dial >To: [email protected] >Reply-To: [EMAIL PROTECTED] > > > >In einer eMail vom 13.07.2005 19:22:16 Westeuropäische Sommerzeit schreibt > >[EMAIL PROTECTED]: > >After Roman dials with their vertical obelisk type gnomons, >when did sundials with gnomons in parallel to the planet's axis >first appear? I found an entry in the BSS Glossary 2000 >for the introduction of an armillary dial in 1598 by Valentin Pini. >Would he have been the first one to have installed a 'modern' dial? >Is there a history of the development of the dial ? > >Best wishes >Heiner Thiessen >51N 1W > > > >Dear Heiner, >it is amazing but the oldest Greek dial of about 340 B.C. is an equatorial > >with horizontal gnomons. >But we know also of Roman dials with gnomons parallel to the planets's axis > >an idea which was born probably in the Hellenistic period. >Sunny wishes >Karlheinz Schaldach -
