All good clocks were set by sundial or observation of the sun’s transit or stars until the mid-19th century and the use of time signals sent along telegraph lines. Some people then set their personal clocks or watches to these observatory or town clocks (often set up by jewelers or clock shops—you still see these “street clocks”), but many preferred to use their own sundials or dipleidoscopes to set their clocks or watches. Pocket watches had “watch papers” in the case that gave the equation of time and advertised the watchmaker who last cleaned the watch.
Cheers, Sara Sara J. Schechner Altazimuth Arts 42°36'N 71° 22'W West Newton, MA 02465 http://www.altazimutharts.com/ Sara J. Schechner, Ph.D. David P. Wheatland Curator of the Collection of Historical Scientific Instruments Lecturer on the History of Science Department of the History of Science, Harvard University Science Center 251c, 1 Oxford Street, Cambridge, MA 02138 Tel: 617-496-9542 | Fax: 617-496-5932 | sche...@fas.harvard.edu<mailto:sche...@fas.harvard.edu> | @SaraSchechner http://scholar.harvard.edu/saraschechner http://chsi.harvard.edu/ From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of rodwall1...@gmail.com Sent: Friday, October 07, 2016 6:07 AM To: 'Sundial list' Subject: Re: Longcase Clock with Equation of TIme Hi all, In 1730. I think I heard somewhere that. Clock manufacturers also sometimes gave a small window sundial to allow you to set your clock. With a equation of time table. Is that correct? Roderick Wall..
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