Sundials - World's Oldest Clocks

North American Sundial Society

Features

nass_news_2012_aug_nass_1The North American Sundial Society held its 2012 conference in Asheville NC, August 16-19.  Alice Io Oglesby and Hugh Munro, local hosts and sundial enthusiasts, took NASS members on a sundial tour through Asheville and the rolling hills of western North Carolina to see the vertical dials at Sunny Point Café and the analemmatic dial of the “kitchen garden” at the Biltmore Estate.  In Burnsville, NASS members saw the Quilt Block Sundial, one of over 200 colourful quilt block paintings along the North Carolina Quilt Block Trail. NASS was welcomed by the Mayor of Burnsville and had the Quilt Block sundial explained by Bob Hampton, astronomer designer and Martin Weaver artist. The Quilt Block Sundial in Burnsville was a most impressive example of teamwork and community support. Travelling further, Brian Leonard showed the armillary sundial he fabricated and installed in Marshall, NC.

The NASS conference included exciting talks on a colourful “Parallel Time East West Sundial” presented by new NASS member Peggy Gunnerson and shadow alignments at Toshogu Shrine by Barry Duell of the Tokyo International University.  Frank King talked about a most unusual circular analemmatic dial he designed for the Metropolitana of Naples (an Italian job).  Dr. King was also this year’s recipient of the Sawyer Dialing Prize.  Roger Bailey discussed dials of Mallorca and the “Box of Sapphires”, a compendium designed by Ibn al-Shatir in the 14th century. Fred Sawyer gave a most interesting talk on “Projected Refraction Sundials with Ambigram”, and at the NASS dinner on Saturday, he distributed a special gift to NASS participants: a location specific projected refraction sundial with the ambigram showing “CARPE” on the dial and “DIEM” in the projected shadow.  Other speakers with interesting presentations included Alice Io Oglesby, Bill Gottesman, Dudley Warner and Ken Clark.  Next year’s conference is being planned for Boston.

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Photos shown: (Top) NASS conference participants underneath Bob Hampton's Quilt Block Dial; (Bottom Left) NASS members examine Alice Oglesby and Hugh Munro's vertical dial at Sunny Point Cafe; and (Bottom Right) Bob Hampton's Equatorial Dial made from a bent yardstick.

Read more: 2012 Conference - Asheville

NASS_2012_Frank_KingThe 2012 Sawyer Dialing Prize was awarded to Frank King at the annual NASS Conference in Asheville, North Carolina. 

The award is given “In recognition of his innovative mathematical and astronomical solutions to problems encountered in the modern design of notable sundials.”  Dr. King is Council Chairman of the British Sundial Society, Senior Lecturer of the Computer Laboratory at Cambridge University, and a Fellow of Churchill College where he is Chairman of the Churchill Archives Committee and Praelector.  At Cambridge he also holds the responsibility of the University Bellringer, “one of the University’s most ancient and unusual posts” with the job of keeping the University Clock telling correct time.

He has designed many sundials including the vertical dial with Italian and Babylonian hours for Selwyn College, Cambridge (a new dial for Old Court), the Pembroke College vertical sundial, the noon mark wall analemma at 10 Paternoster Square in London, the unusual near-horizontal gnomon sundial as a memorial dial for Margaret Stanier, the analemmatic dial for Queen Elizabeth II Jubilee (2002) and the circular analemmatic dial for the MetroTransit Authority (Metropolitana) of Naples.

Frank was presented with a cash prize of $200 and a custom made Spectra Sundial by Jim Tallman of Artisan Industrials.

http://www.artisanindustrials.com/world-of-sundials/spectra-sundial-cambridge-cambridgeshire-england.html

2011_UnivPrepAcademyPillarDialSeattle: Sundial Capital of the United States?  The 2011 North American Sundial Society had perfect blue-sky weather for its annual conference held in August 2011.  Professor Woodruff “Woody” Sullivan, conference host at University of Washington started the fest by showing off the large vertical sundial built in 1994 on the side of the Physics and Astronomy Building.

The conference covered a wide range of topics including two presentations on stained glass sundials, the 17th work of La Hire and his successful "La Gnomonique ou L'art de tracer Des Cadrans" ("Gnomonicks or The Art of Shadows of Sundials") and dialist-surveyor and one of the founding members of the Acadamie Royale,  Jean Picard. The methods of taking photos of the sun over months of time, called Solargraphy, was presented by Art Paque, and then there were talks on the operation of cylindrical sundials, sundials that can show standard time, an update on the Mars sundial, and discussions on solar alignments, heliodons and stair shadows.

Helmut Sonderegger, this year’s recipient of the Sawyer Dialing Prize discussed the Rheticus Memorial sundial designed for Georg Joachim Rheticus, the first Copernican. 

Download the PDF and read about the conference in detail, including the bus tour of Seattle dials visiting the Pillar Dial of University Prep Academy, Epiphany School Vertical Dial, and Rebecca Cummins analemma and colored skylights in the ceiling of the Montrose Public Library.

Attachments:
Download this file (2011 NASS Conference Seattle.pdf)2011 NASS Conference Seattle.pdf[NASS Annual Conference]1005 kB

Dear Friends,

A great loss has hit our gnomonic community in Italy. Our friend Giacomo Agnelli died about a week ago.  Giacomo was one of the great gnomonists of the past. He had written dozens of articles in engineering and horology, also dealing with mechatronics [mechanical] sundials. He had worked at the European space project, and had frequent ...articles for our magazines [on] gnomonics. He had participated in all meetings of horology in Italy and was known for his satirical cartoons and gnomonic caricatures ...

Nicola Severino                      Visit A Tribute to Giacomo Agnelli

[from the Sundial Mailing List, sundial Digest, Vol 71, Issue 3 https://lists.uni-koeln.de/mailman/listinfo/sundial  ]

NASS_2011_SondereggerThis year's Sawyer Dialing Prize awarded at the 2011 NASS Conference in Seattle Washington was given to Helmut Sonderegger, "In recognition of his ongoing development and support of the dialing software Sonne, and his many years of leadership in his national society." His acceptance talk was on one of the first Copernican followers, Rheticus.

 For many years Helmut Sonderegger has been active in the German Sundial Association and was chairman of a team of dialist to produce the 3rd Editiion of the Austrian Sundial Catalogue.  His most famous free sundial software, „Sonne“ calculates about 20 different sundial types and his program „Alemma“ is devoted to the calculation of analemmatic sundials.  The software is available at his website, www.helson.at.  He endeavors to help people who make sundials through his software and through articles in the NASS Compendium and the German Rundschreiben, and for local groups.

Helmut was presented with a cash prize of $200 and a custom made Spectra Sundial by Jim Tallman of Artisan Industrials.

http://www.artisanindustrials.com/world-of-sundials/spectra-sundial-feldkirch-austria.html

Along with her husband, Mrs. Webster spent much of her life and fortune combing auction catalogs and antiquarian shops to create a collection of early scientific instruments so renowned, it is considered in the same company as the Museum of the History of Science at Oxford University and the National Maritime Museum in Greenwich, England, according to Bolt, Adler planetarium vice president for collections.  The Websters are primarily responsible for the world-class collection of scientific instruments at the Adler.

http://www.suntimes.com/news/obituaries/5722751-418/marjorie-kelly-webster-95-collected-scientific-instruments.html

NASS is supporting the Adler to catalog their sundial collection enhanced over the years by Marjorie Kelly and her husband.

This Sundials for Starters appeared in The Compendium in December, 2005

by Robert Kellogg, Ph.D.

Dial and Gnomon Set to Correct Site Latitude of 38 Degrees

This is the start of a regular column to review the basics of Sundials.  Of course NASS provides an introductory CD disk on sundials and there is always the classic reference Sundials, Their Theory and Construction by A.E. Waugh.

For this article, let’s consider some basics in buying a sundial for the garden.  Or perhpas you want to make one.  There are magazine catalogs and websites that offer “fine English dials”.  But are they for you?  Consider the latitude of an English dial.  London is at about 51º north latitude, while most of the populated area of North America is below 45º.  Take a look at the gnomon of your potential purchase. The gnomon should be approximately the same angle as you latitude.  Here we’ll illustrate a dial (Figure 1) from the Naval Medical Center in Bethesda, Maryland with latitude of approximately 38º.

Attachments:
Download this file (SerlesRuler.jpg)Serle's Ruler[Ruler to Measure or Make a Sundial]37 kB

Read more: Sundial Latitude

Subcategories

  • Sundials for Starters
    Article Count:
    6
  • Conferences
    Article Count:
    24
  • Sawyer Dialing Prize
    Fred Sawyer, in cooperation with the North American Sundial Society, established a continuing yearly award, the Sawyer Dialing Prize to be presented by NASS to an individual for accomplishments in or contributions to dialing and the dialing community.
    Article Count:
    20
  • Terwilliger Sundials
    In these pages is the famous tub sundial created by Robert Terwilliger using his laser trigon to lay out hour lines on a very irregular surface to create a working sundial.
    Article Count:
    1
  • Biographies

    Who are today's sundial artisans?  Here are several bioghraphies of several artisans that show the unique combination of talents in art, engineering, and mathematics.

    Article Count:
    6
  • Sunquest Sundial

    This section is dedicated to Richard Schmoyer who invented the Sunquest sundial.  Please visit http://sunquestsundial.org/ as well.

    Article Count:
    3