Sundials - World's Oldest Clocks

North American Sundial Society

2019 HiltonGardenInn DenverDowntownRegister now for the North American Sundial Society 2019 conference to be held in the mile high city of Denver, Colorado. As always there will be an exciting list of presentations and tour of sundials. This year the conference is in June, starting Thursday afternoon at 4:30pm on June 20th continuing through 1pm on Sunday 23rd. THIS IS THE BUSIEST VACATIO WEEKEND OF THE YEAR IN DENVER. So make your registration now at the Hilton Garden Inn - Denver Downtown, 1400 Welton Street Denver CO 80202 (Phone 303-603-8000). NASS has a discound rate of $179/night (plus 15.75% tax). This rate will apply 5 days before and after the conference if rooms are available. Contact the hotel using the "NASS19" discount code. You can also go to the hotel's website set up for the NASS Registration at:
http://hiltongardenin.hilton.com/en/gi/groups/personalized/D/DENDDGI-NASS19-20190620/index.jhtml

The hotel is 25 miles from the Denver International Airport. Transportation to the hotel is possible using the RTD Train from the airport to Union Station and then the Free Mall Ride Bus on 16th Street. There is always taxi service and Uber.

Full NASS registration until April 14th is $310-$322 depending upon dinner selection. After April 14th the cost increases to $335-$347. Download the attached registration form for full details. If you have a presentation or a table display, please contact Fred Sawyer.

Attachments:
Download this file (NASS-DenverRegistration-2019.pdf)NASS-DenverRegistration-2019.pdf[ ]175 kB

2017 NASS Group Photo

In August 2017 the North American Sundial Society held its annual conference in St. Louis Missouri with a series of well attended talks on the mathematics of sundials, software tools to design sundials, and even videos on YouTube that are about sundials. NASS participants visited local astronomical sites of interest, including the War Memorial Dial in Forest Park. Don Snyder worked with Perry County and Perryville, a town on the eclipse path, to creat a new sundial for the courthouse gardens. Local craftspeople created the dial following Don's design. It, as other significant dials, is in the NASS Sundial Registry available on the web. At the Missouri Botanical Garden attendees saw the Schmoyer Sundial with its analemma shaped gnomon to tell civil time. It was made by Bill Gottesman and donated to the Garden by Don Synder and Bill. Also at the Botanical Garden is the Ottoman dial designed by Roger Bailey, following the design of the horizontal dial at Topkapi Palace in Istanbul. A presentation from Bill Iseminger on the Cahokia Woodhenge discussed the astronomical alignments such as solstice sunrise and sunset. Wood Henge was on the sundial tour itinerary, but due to heavy traffic, was excluded to reach the eclipse viewing site on time (the sun and moon had their schedules that were not subject to change).

2017 NASS Eclipse WatchersThe highlight was a visit to Jefferson Barracks to watch the total solar eclipse on August 21, 2019. All participants were given special safe viewing glasses to protect their eyes before and after totality. With cooperating weather, the eclipse was viewed with devices ranging from a pinhole camera obscura to telescopes with solar filters. A truly spectacular event. Bill Gottesman demonstratee his eclipse "sundial" that used the orientation of the eclipsed sun's cusp orientation as an indicator of time.

Attachments:
Download this file (2017_Conference_St.Louis.pdf)2017_Conference_St.Louis.pdf[ ]1492 kB

The North American Sundial Society held their annual sundial conference in Pittsburgh, a four day affair for gnomonists to convene and share their enthusiasm for all things sundials.  This conference was special as the NASS celebrated the society's 25th anniversary.  Starting in 1993 with only a handful of dialing enthusiasts, the society has grown to over 250 members extending from North America to all parts of the globe.  For this conference NASS members convened from around the world representing countries of Canada, the United Kingdom, Brazil and Australia.  Scheduled to attend but intervened by last minute issues preventing their attendance were dialists from Mexico and Italy.  All came with one objective - to share their enthusiasm for sundials.

On Thursday evening Aug 16th the dialists gathered at the Garden Hilton in downtown Pittsburgh to participate in drawings for assorted door prizes including sundials and books on dialing.  On Friday all boarded a charter bus to view the sundials of Pittsburgh, taking a tour that included a large steel equatorial designed and built by Anthony Vitale, a multi-faced dial at Old Economy Village dating to 1825, and a dial commemorating the battle at Bushy Run in 1793 that was found at the site of the Fort Pitt Block House during its 1894 restoration by the Pittsburgh Chapter of the Daughters of the American Revolution who still own and preserve the structure and the sundial. The tour included the dial at Frick Fine Arts Museum (near the geenhouse), the Riverfron Park Sewickley analemmatic (human) sundial, and the large octagonal horizontal sundial at Homewood Cemetery.

On Saturday and Sunday attendees listed to presentations on ring dials (with a diverson into the history of solving cubic equations), helical sundials (and 3D printing), viking sunstones (with a description of the birefracting material calcite), lunar sundials (Sciathericum Seleniacum), van Schooten and Dialing Scales (published in 1657), Time for Rita's (a vertical declining dial designed for an ice cream store in Elizabethtown, PA), and zenith days below the Tropic of Capricorn (and a year-long photograph of the analemma over the El Cerrito pyramid in Querétaro, Mexico),and much, much more.  On Saturday evening the Sawyer Dialing Prize was awarded this year to Gianpiero Casalegno from Italy for his achievements in harnessing modern ditital technology to the benefit of tradional dialists around the world.  The prize includes an elegant Spectra Sundial by Artisan Industrials (Jim Tallman) and a cash award.  Gian has chosen to given the cash award as a donation to the Bellingham Mural Project lead by Sasch Stephens. The dial will be dedicated on the coming equinox, Sept. 22.

NASS members enjoyed this year's conference and are now planning for next year's convening, tentatively to be held in Denver, Colorado.

Attachments:
Download this file (2018 NASS Conference - Pittsburgh.pdf)2018 NASS Conference - Pittsburgh.pdf[ ]422 kB

Portland Maine WCSH Channel 6 presents local and national news and the usual sports, weather and traffic.  But on a recent 207 broadcast, they reported an invasion ... an invasion of sundialists coming to Portland, Maine for their annual conference and their search for a dial made over a century ago by Albert Crehore that might still be somewhere in Portland. 

Members of the North American Sundial Society (NASS) take the art and science of sundials very seriously.  Watch the video and consider joining NASS for even more sundial adventures.  Visit Portland Channel 6 News:

Attachments:
Download this file (2016_NASS_Conference_Portland.pdf)2016_NASS_Conference_Portland.pdf[ ]1040 kB

Ellipsoidal Gnomon SundialThe 2015 NASS Sundial Conference was held in Victoria, B.C.  Roger Bailey organized the conference and provided a sundial tour in Victoria, stopping at the BC Legislature Rose Garden dial, the St. Ann's Academy dial, Christ Church Cathedral vertical dial, the BC Government House totem sundial, and more, including a visit out to the Dominion Astrophysical Observatory to see the 1.8 meter telescope.

Steve Luecking discussed spherical and elliptical gnomons where tangent points are dropped to a circle circumscribing the ellipse and hour lines are then drawn as tangents from the points on the circle.  Steve used this technique to design a sundial using an elliptical gnomon with symbolic native art for Victoria. (Illustration at right)

Len Berggren described the design and building of a sundial that can show both solar and mean time, done with a $1000 grant from NASS.  Presentations included John Schilke discussing the Heliotrope and Heliograph.  Barry Duell outlined the history of a sundial at Willamette University donated by the Class of 1916.  The dial was dedicated to Prof. Matthews and engraved with his motto of "Sagacity, Audacity, Holiness, Chairty."

Prof. Woody Sullivan described 3 new dials.  The first two, an Oculus table and a Solar Hour Benches are at the San Francisco Exploratorium.  The third dial at the Very Large Array Radio Telescope in New Mexico is the world's first and only sundial made from one of the original radio telescopes.  It was constructed in memory of Prof. Ron Bracewell of Stanford Univ. a pioneer in radio astronomy.

Jackie Jones, Doug Bateman, Sasch Stephens, Fred Sawyer, and Mark Montgomery presented a wide range of topics from reflecting dials, elliptical dials and moon dials, to ancient Egyptian shadow clocks.  Bob Kellogg, unable to attend, sent along a video on a new digital gnomon sundial, while Frank King and Steve Luecking discussed optical geometries and illusions. (Read more in the attached dowloadable PDF)

This year's Sawyer Dialing Prize was awarded to Ing. Gianni Ferrari "for his long career educating the dialing community about the nearly forgotten heritage of ancient Islamic gnomonics and the wide variety of modern analytically developed sundial." (Read more about the Sawyer Dialing Prize)

Attachments:
Download this file (2015_NASSConference_Victoria.pdf)2015_NASSConference_Victoria.pdf[ ]1043 kB
Founding Fathers - Washington Dial at Mt. Vernon, VA

In August, 2014, the North American Sundial Society had a terrific conference in Indianapolis, Indiana, discussing sundial topics from the sundials of Our Founding Fathers where Fred Sawyer talked about the sundials and stories of George Washington, Benjamin Franklin, and Thomas Jefferson. 

Greek Dial from Ai Khanum

Another highlight was Jack Aubert's talk on the mysteries of an ancient Greek sundial found at Ai Khanum in the northern of Afghanistan and computing the hour lines.  Who built this dial more than 2000 years ago and what kind of mathematics did they use?

Peggy Gunnerson described the evolution of a modern sundial parallelpipeds sculpture, creating an artistic and unusal east-west sundial.  And Stephen Lueking presented a series of modern sundial designs for DePaul University.  These were just some of the presentations.  Subscribe to the digital edition of The Compendium from NASS and receive them all.  The annual Sawyer Dialing Prize went to Robert Kellogg for NASS outreach and the invention of a digital sundial.  Read more about the presentations and the tour of Indianapolis by downloading the attachment below.

Peggy Gunnerson Parallelpiped Dial
Stephen Luecking - Dial Design for DePaul University

Hosting 46 people, the conference was coordinated by George and Betsy Wilson and Mark an Phyllis Montgomery.  During the Friday Sundial tour NASS was welcomed by Eagle Elementary School, the senior high ability class and their teachers.  All gathered in the school's courtyard to show a large horizontal sundial, dedicated as a memorial to a former teacher, Linda Eads.

Attachments:
Download this file (2014_NASSConference_Indianapolis_IN.pdf)2014_NASSConference_Indianapolis_IN.pdf[ ]1138 kB
2013_CHSI_PocketSundial
[CHSI - Harvard Collection]

Appropriate to NASS’ visit, Harvard had just recently completed a new major exhibit entitled “Time and Time Again” offering conference members a unique view on the changes in time keeping and the social impact of timekeeping technology.  On Friday afternoon, NASS members followed the Time Trails through the Harvard campus, locating historical sundials “in the wild” and timepieces in the Semitic, Peabody, and Natural History Museums.

The day was finished by two presentations “Trading in Time: European Pocket Sundials Designed for Colonial Use in American Territories by Sara Schechner and “Portable Sundials in Austrian Museums” by Ilse Fabian.

During Saturday a plethora of sundial talks were presented by NASS members, including “Counting the Sunny Hours” by Roger Bailey to a new “Wandering Gnomon Sundial Designn” by Fred Sawyer.  Bob Kellogg presented the making of an animation illustrating the Ibn al-Shatir sundial proposed for Observatory Park in Virginia for the Analemma Society.  One of the most color presentations was Art Paque’s update on Solargraphy, illustrating the technique of forming daily images of the sun a photographic paper that at the last is digitally scanned and preserved.

Read more: 2013 Conference - Boston/Cambridge

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.

nass_news_2012_aug_nass_2nass_news_2012_aug_nass_3

 

 

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.

Attachments:
Download this file (2012_Conference_Asheville_NC.pdf)2012_Conference_Asheville_NC.pdf[ ]942 kB

Read more: 2012 Conference - Asheville