Re: Planispheric projections

cate the horizon on the back side side of Chandler's planispheres (that is, the horizon for the swath of sky opposite the celestial pole), just change the plus sign in the above formula to a negative sign. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich gri...@

Re: due east

idered east from the poles. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich gri...@rahul.net San Leandro, California --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Sundials and Sunburns

. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich gri...@rahul.net San Leandro, California --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: A bit of fun, but time related

issue's 50 25 Years Ago column, page 28. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Border Crossings

! ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: The Libertine

. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Avila sundials

query whether you'd already seen Avila's ST article. If not, here are the particulars: Charles Avila. A Precision Sundial of Bronze. _Sky and Telescope_, Vol. 88 No. 6 (December 1994), pp. 88-90. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich

Re: Is the USA 'Daylight-Saving' period to be extended ?

on 9 April: http://sfgate.com/cgi-bin/article.cgi?file=/c/a/2005/04/09/MNGCUC5RCV1.DTL Either way, I still don't understood why our DST period is not centered on the June solstice. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED

Re: Stonehenge replicas in US

. It was constructed as a memorial to those from that region who lost their lives in World War I. http://www.theslowlane.com/99tripe/mstone.html ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California -

Flat Disks and Round Shadows

, which adorns the Terman Engineering building at Stanford University. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California -

Athens Olympics Sundial

?section=olyid=1800813 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California p -

When the Transit of Venus Transits the Meridian...

? ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California -

Gnomonics in a Murder-Mystery Novel

Saint Sulpice cathedral plays an important role. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California -

Re: A new term for The Glossary?

supply flights originate in Christchurch. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California -

Re: On northern vs. southern dials

. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California -

Thomas Jefferson's Sundial

-Dispatch: http://www.monticello.org/press/sundial.html http://www.timesdispatch.com/frontpage/MGB1H1UMRUC.html ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California

Re: moon dial

! ;-) ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California

Solar Calculations Website

in handy as a check, or as a resource to which you can refer those with just an occasional need for solar data. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California [begin attached text] NOAA Media Contact: Jana

Re: Armillary Spheres in Portugal

. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California

Re: Determining hour-angle from azimuth Correction

-to-polar operation, to r and theta. Theta will be your H, automagically placed in the correct quadrant. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California

Re: Sundial Formula Erratum in Meeus's Book

) tan( phi ) ] / Q ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California You wrote... I may be completely off the point with the following remark, as I do not have the book you cited. So I am just guessing what

A Sundial as a Prize

of this week's newly dubbed Nobel laureates are insanely jealous, for they only get a lousy Nobel medallion, not a genuine Moss Universal Equatorial Dial ;-) ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California [begin

Re: North American Sundial Society Repository

computer operating system to be fully functional (not counting the included dialing software, of course)? ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California

New Book for Sundial Buffs

-674-85433-0 http://www.hup.harvard.edu/F99Books/catalog/sun_church.html ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California

Re: average EOT correction

. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California

Re: Sundials not needing corrections

. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California

RE: New time??!!

by R. Newton Mayall. The dial was (still is?) in the collection at the Boston Museum of Fine Arts. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California

Re: query

. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California

Re: new guy on the block

. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California

Re: Visit to Philadelphia

? ~~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California ~~

Re: Porter Sundials

of this mailing list with immediate access to the book can answer this question? ~~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California ~~

Long-lasting Painted Sundials

inches of rain each year and 6 hours (average) of direct Sun per day. I would think this longevity issue comes up when muralists decorate a wall. What methods do muralists employ to preserve their work? ~~ Mark Gingrich [EMAIL

Almost a South Pole Sundial

or communication. ~~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California ~~

Noon Marks in Cathedrals

Joe Sempik [EMAIL PROTECTED] wrote: Last year I was fortunate enough to visit Bologna and see the meridian lines at San Petronio's and at the Astronomical Museum, the former observatory. The great meridian line at San Petronio's inspired fascination with almost every visitor. It would be

Natural Sundial Restored?

In Mrs. Alfred Gatty's _The Book of Sundials_, the town of Settle in Yorkshire, UK was said to possess the following landmark back in the eighteenth century: A hill called Castleberg, which rises at the back of town, was crowned by a pile of rock which cast a shadow upon large slabs of

Reprint of Rohr Now Available

~~ Mark Gingrich [EMAIL PROTECTED] San Leandro, California ~~

Largest horizontal dials

with its siting in the most economically depressed part of the city. Sadly, it has already suffered from vandalism, and I would not recommend that anyone go there without a police escort ~~ Mark Gingrich [EMAIL PROTECTED