Re: Hail to the Chief

not wrong :-) ) about 5 and 25. Best Gianni Ferrari 2018-01-17 19:04 GMT+01:00 Frank King <f...@cl.cam.ac.uk>: > Dear All, > > I gather from the UK media that > the recent medical check-up > undertaken by the U.S. President > involved some "cognitive tests&

Re: The utility of sundials today.

of a hotel 43. when noon will be in distant cities. Geographical or universal sundials 44. special hours. Hours of Islamic prayers, opening hours of a shop, school hours, etc. Best Gianni Ferrari <https://www.avast.com/sig-email?utm_medium=email_source=link_campaign=sig-email_content=webmail>

Re: Genuine or not?

.) To learn more see in http://www.paginegialle.it/roma-rm/orologi/guaytamelli-rodriguez-badra http://www.polvereditempo.com/labo_bottom.htm >> Traiettoria https://www.google.it/search?q=guaytamelli+roma=1393; bih=783=lnms=isch=X=0ahUKEwjAhPrnrJ_ SAhVFtxQKHfynCkMQ_AUICCgD=0.95 Best Gianni Ferrari

Re: An interesting piece of timekeeping

See in : http://sihh.vacheron-constantin.com/it/orologi-con-complicazioni-astronomiche/les-cabinotiers-celestia-astronomical-grand-complication.html Gianni Ferrari 2017-01-17 13:45 GMT+01:00 Willy Leenders <willy.leend...@telenet.be>: > I do not understand all the indications on t

Exhibition of sundials

Beautiful exhibition of sundials : *Time and the Cosmos in greek-roman antiquity *at Institute for the Study of the Ancient World - New York see: http://isaw.nyu.edu/exhibitions/time-cosmos Greetings Gianni Ferrari --- https://lists.uni-koeln.de

Re: FW: Mosaic with sundial on a pillar

preserved in the National Archaeological Museum in Naples. This mosaic was described in NASS - The Compendium, Vol.10, num.2 , June 2003 http://cir.campania.beniculturali.it/museoarcheologiconazionale/itinerari-tematici/galleria-di-immagini/RA39 Gianni Ferrari <https://www.avast.com/sig-em

Re: Sundial in Huacalera in Argentina

of Capricorn passes. But this places moves slowly because ecliptic inclination changes :-( Latitude of Huacalera is 23° 26’ South and the Sun is at Zenith in Winter Solstice in a place near the town. http://es.wikipedia.org/wiki/Huacalera Gianni Ferrari 2015-06-05 21:07 GMT+02:00 Willy Leenders

A new book (in Italian)

/6616660/G_Ferrari-Formule_alcune%20pagine.pdf My best wishes Gianni Ferrari P.S. For European interested readers I recommend the online bookstore *IBS.it* who practice a discount of 15% : http://www.ibs.it/libri/ferrari+gianni/libri+di+gianni+ferrari.html G_Ferrari-Formulae_Index .pdf

Re: A new book (in Italian)

Sorry, I forgot to write that of my book exists also the ebook (PDF) version : cost 10 € Best regards Gianni Ferrari --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Copernicus reflecting dial

the castle, sent me the correct declination but, due to laziness and lack of time :-), I have not yet tried to correct my article. I agree with Fabio on all that he wrote. A greeting to all Gianni Ferrari 2015-04-07 21:02 GMT+02:00 Claude Hartman sunlightdesi...@earthlink.net: Gianni Ferrari's

Re: A few new Tables for the Gnomonist...

, I saw that they change in a strange way, while EoT in that month decreases continuously. Best wishes Gianni Ferrari 2014-06-11 18:05 GMT+02:00 Kevin Karney kar...@me.com: Dear Friends I have been amusing myself with the astronomy of the Sun and have done a very complete coding of Meeus

Re: Sundials in (or near to) Dubai

. -- - Gianni Ferrari 2014/1/25 Thibaud Taudin Chabot tcha...@dds.nl In Dubai the general rule applies that in all major mosks there might be a sundial, sometimes an old one, sometimes a simple one that is just indicating noon. Many mosks also have what I call a 'noon

Fwd: [HASTRO-L] Uncovering ancient Rome

Perhaps someone is interested. Best Wishes to all Gianni Ferrari -- Forwarded message -- From: Clark Whelton cwhel...@verizon.net Date: 2013/12/21 Uncovering ancient Rome From http://news.indiana.edu/releases/iu/2013/12/augustus- virtual-reality-project.shtml

Re: temporal hour including refraction

and of the prayers lines. Best Gianni Ferrari --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Unicode characters for degrees, minutes, seconds above the decimal point.

I agree completely with Thibaud ! Best wishes Gianni Ferrari - 2013/7/7 Thibaud Taudin Chabot tcha...@dds.nl This looks not logic. The unit symbol comes *after *the value and not in between. If you put the ° above the decimal . then what unit is the value after

Re: What is this plate?

of the formulas of Gauss is sin (A / 2). sin [(b + c) / 2] = sin (a / 2). sin [(B-C) / 2] See the excellent volume* F. Brunnow Spherical Astronomy-1865* (that can be downloaded free) Best regards Gianni Ferrari 2013/6/12 dharani dhar...@o2.pl Roger and Gianni, Thank you for you kind replies. I am

Egyptian sundials

/6616660/Herbert%20Rau_Egyptian%20sundials.pdf Gianni Ferrari P.S. Does anyone know other books or writings on this subject? --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Is East/West always at exact 'right-angles', to North/South?

, the qibla can be found by looking at the direction of the Sun when it is exactly at the nadir of Mecca, around January 13 and November 29. The first description of this method can be found in a text of the astronomer Nasir al-Din al-Tusi (Persia 1201-1274) Best Gianni Ferrari 2013/4/11 Douglas

Re: Is East/West always at exact 'right-angles', to North/South?

think that Mr. Thin is not very annoyed for this lack: because he cannot move from the Pole he is not very interested to portable sundials Gianni Ferrari -- - 2013/4/10 Beverly Stimpson beverly.stimp...@gmail.com Dear List Members (and experts!), I am a new

Re: Railways and Sundials

John, beautiful work! Because I know your works I should not wonder, but looking at the details of your railroad I remained open-mouthed : amazing! Bravissimo! Gianni Ferrari 2013/1/5 John Carmichael jlcarmich...@comcast.net *Hello All:* * * *Bare with me, this email will eventually relate

Venus-transits 2004 - 2012 - 2117 and a letter to people from 2117

occurred only in 303, in 546, in 1040 and 2004 and it will repeat only in 2247 :-( Best wishes Gianni Ferrari - Ing. Gianni Ferrari Lat.44;38,18.5N Long. 10;56,05.3E gfme...@gmail.com --- https://lists.uni-koeln.de/mailman

Re: 2 questions: declination animation

practice you can get the information you need. Best wishes Gianni Ferrari 2012/1/11 Shadows Pro fblatey...@shadowspro.com Hi Darek and all There is a feature in my program Shadows Pro to reverse engineer a vertical sundial from its picture. It does not correct aberrations due to the camera

THE ANCIENT ISLAMIC SUNDIALS - A new book (in Italian)

%20MERIDIANE%20ISLAM_Alcune%20Pagine.pdf My best wishes Gianni Ferrari - Ing. Gianni Ferrari Lat.44;38,18.5N Long. 10;56,05.3E gfme...@gmail.com --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: altitude dial

to points) as in analemmatic. Analemmatic are never altitude sundials, even if they are built on a vertical wall. A sundial that perhaps is close to what you have described is, for example, a shepherd s. with the cylinder surface developed on a plane, like the one in the picture. Best Gianni Ferrari

Re: What can be calculated with a sun dial?

) - The direction of Mecca, that is the Islamic kibla Best wishes Gianni Ferrari 2010/11/16 Jos Kint jos.k...@skynet.be Dear sun dialists, What can be calculated with a good sun dial? Here is a list of 19 topics. Can you add some more items? 1. The hour of the day 2. The day

Egypt

are discussed, with tables, graphs, formulas, etc. (page 128-151) Regards Gianni Ferrari --- https://lists.uni-koeln.de/mailman/listinfo/sundial

A sundial in the Khmer temples

An unknown (for me ) website on Khmer temples http://www.sundial.thai-isan-lao.com/ Giani Ferrari -- Mail to : gfme...@gmail.com Lat.44;38,18.5N Long. 10;56,05.3E --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Fwd: how italian hours

of hour to noon (in the morning) or after it (in the afternoon). So : 5, 4, 3, 2, 1, noon, 1, 2, 3, 4, 5. They use “Arabic numbers” or, in oldest sundials, numbers written with “letters” ( Abjad method) Gianni Ferrari -- Mail to : gfme...@gmail.com Lat.44;38,18.5N Long. 10;56,05.3E

Re: how italian hours

Chris Lusby Taylor, has very kindly written me that in my first Email *“How trace the italic hour lines” *I have made an error: it’s true! The error is serious enough and I thank Chris and apologize to all L I wrote *Also for each point of the line of horizon (on the sundial) pass one

Re: how italian hours

Sorry , I forgot the table :-) Gianni F. TabOre.pdf Description: Adobe PDF document --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: how italian hours

=10, I=19, B=1, T=2 pass all through the same point. For D=18 we have T=2F/3-2 and, for example, the lines with F=15, I=18, B=12, T=8 pass all through the same point. This is a simple ( J ) method to draw the Temporary hour lines. Best wishes Gianni Ferrari

Re: how italian hours

of the readers of this list J These sundials are enough used in places where it is important to know how many hours of light remain, as fields for games, small airports, sea places, wide parks, etc. Best wishes Gianni Ferrari 2010/3/30 Jack Aubert jaub...@cpcug.org I have been thinking the same thing

Re: how italian hours

that this is the mathematical term in English :-) ) , that is a direction. Therefore the modern hour line HMOD is parallel to the Italic hour line HIT = 2 HMOD and to the Babylonian one HBAB=24-2HMOD Gianni Ferrari P.S. I am completely in agreement with Frank on the difficulties that the method

Re: Another Human Gnomon ... Vertical in Bruz (France)

Very nice and NEW ! Bravo! Best wishes Gianni Ferrari 2009/11/2 robic.joel robic.j...@wanadoo.fr Hi John, Patrick, Willy, Fer and all, Here is the new one I began last winter: http://www.cadrans-solaires.fr/style-humain-bruz.html the vertical morning part is finished now, I will complete

Re: Symbols for Sunrise and Sunset

Frank, two different symbolsGianni Ferrari -- Mail to : gfme...@gmail.com Lat.44;38,18.5N Long. 10;56,05.3E attachment: sun2.jpg--- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Symbols for Sunrise and Sunset

Perhaps a little arrow as in the attached image can be useful:-) Best Gianni Ferrari 2009/8/15 Frank King frank.k...@cl.cam.ac.uk Dear All, A designer friend has asked about symbols for sunrise and sunset on sundials. Given the obvious importance of these two points of the day I

Re: Symbols for Sunrise and Sunset

I apologize but I have seen the Willy LEENDERS's Symbols only after sending my message :-( Gianni Ferrari --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: A Wonderful Thing

/ You can see many details of the two sundials in flickr.com/photos/renzodionigi/2892284622/ and in http://www.sullacrestadellonda.it/meridiane/mondovi.htm Sundials in Mondovì- Cuneo - Italy Best wishes Gianni Ferrari --- https

Re: Interesting sundial in Japan

:00 to 18:30 The lines of the hours on the northern face would be those drawn on the southern face for the same hours (see the Roger Bailey’s drawing) Does someone know if the hours are written also on the northern face of this sundial? Best Regards Gianni Ferrari attachment

Re: better questions

the natural motion of the Sun with our mechanical artifices? :-) Best wishes Gianni Ferrari --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Info on a new sundial

of the disk Best wishes Gianni Ferrari --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Relationship between Babylonian, Italian and Solar time

find that the Italian line with I=16 and solar Line with S=9 pass in a same point, then the daily line trough this point is that of a day with Length D=10 On Equinoxes I-B=12 and I-S=S-B=6 and so on My best wishes for a sunny Spring Gianni Ferrari 2009/3/20 Willy Leenders

Re: The Pantheon

many characteristics that might relate to the Pantheon as a sundial Go To: Colorado scroll down to Englewood #555 http://sundials.org/registry/ Bob --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- Gianni Ferrari Mail

Re: The Pantheon

on the dome. From October 1st to March 12th the light falls always on the inside surface of the dome, that is on the ceiling. A regard Gianni Ferrari P.S. Some image of Pantheon are in http://www.florense.it/Architettura_Mediterranea/Pantheon.asp#Rotonda_del_Pantheon http://commons.wikimedia.org

Re: NZ dial

in 1935 (?) http://www.hort.wisc.edu/mastergardener/Features/botgardens/ChristchurchBG/ChristchurchBG.htm Best Gianni Ferrari --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: International Year of Astronomy 2009

Year Gianni Ferrari P.S. Here in Italy our Sundial Society has its meetings (Seminari di Gnomonica) every 1.5 years, once near the Spring Equinox and the following near the Autumn Equinox. 2009/1/1 Simon [illustratingshadows illustratingshad...@yahoo.com We here in Silver City, New

Re: Moondial, rather than sundial, timekeeping related

Gianni Ferrari --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Mosque's sundials

and the lines of the zodiacal signs. In the little clouds are written the names of the signs: Capricorn, followed by Sagittarius (near to the gnomon) etc. The three sundials were built around of 1669 (1074 H) In the fourth photo there is a very modern sundial: 2002. Best wishes Gianni Ferrari

Re: Sundial of Mada'in Saleh

J.F. Healey has written an article A Nabatean Sundial from Mada'in Salih (1989) in the magazine SYRIA n.66 Also if I have only these information I think that it is impossible that this kind of sundial was build in the 6th century B.C. ( I don't know no sundial so old !). Best wishes Gianni Ferrari

Re: equal and unequal hours

Braunschweig Cathedral sundial again ! I don't know the article of Curt Roslund in the BSS Bulletin, september 2005, pag. 116-119 about the the vertical sundial of Braunschweig Cathedral of 1346 with the equal hour lines and a polar gnomon but … in 1999 I have written a Note, published in

Re: equal and unequal hours

wishes Gianni Ferrari --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: equal and unequal hours

. As Gianni Ferrari says: For what I know the equal hours were never used in western classical antiquity by the common people and they were used only from astronomers and scholars in their calculations of the durations of periods of time (Ptolemy, etc.) The only system of hours used

Re: AW: Missouri Ottoman Sundial

that are called Italic or Italian in all modern and ancient gnomonic books, all over the world : -) Best wishes Gianni Ferrari --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Ezanic Hours

that changes (slightly) from one day to another : today (June 16) they are 1h + 0.54sec length; on March 20 the length is 1h – 0.75 sec, etc. Best regard Gianni Ferrari --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Monumental Sundial; 14 missing seconds

10/2002 (in Italian) Also in French: *Propriétés de l'ombre* - Cadran Info N°16 – Octobre 2007 Best Gianni Ferrari 2008/2/18, Roger Bailey [EMAIL PROTECTED]: I remember John Carmichael did some experiments on a truly monumental sundial, The McMath-Pierce Solar Observatory, Kitt Peak

Re: Monumental Sundial; 14 missing seconds

** *Propriétés de l'ombre* (in French) in : http://www.mediafire.com/?92ssnp6tfen Gianni Ferrari --- https://lists.uni-koeln.de/mailman/listinfo/sundial

New Email Address

I wish inform list members of my new address : [EMAIL PROTECTED] Thanks Gianni Ferrari Mail to : [EMAIL PROTECTED] --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Non-terrestrial sundials

in the station of Villette (village where Bonzani lives ). The sundial had dimensions of around 40x30 cm (16x 12 inches ) . It was removed by its position for safety reasons even if the gnomon stuck out only few cm. Gianni Ferrari - Original Message - From: J. Tallman [EMAIL PROTECTED

Re: Greek and Roman sundials

). The polar style began to be used toward the first years of the XIV century (one of the first known examples - if not the first - it is the sundial of Ibn al Shatir in Damak ( 1371 ) Best wishes Gianni Ferrari - Original Message - From: Noam Kaplan To: [EMAIL PROTECTED] Sent

Re: Italian hours

as to the fact that in England you keep to the left side of the road and in continental Europe we keep to the right (however here the trains run on the left track ! ) :-) Best regards Gianni Ferrari - Original Message - From: Chris Lusby Taylor To: sundial List

Re: strange longitude - Gianni's note

points of John Good's book For ex. in pag. 146, 201, 204, 205 (where we find also a Plan's Long. ! ) :-) Best Gianni Ferrari --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: strange longitude

must be read Pl Long or Plane's Longitude. I leave the search on other ancient texts (for me very difficult for availability and for language) to the English friends :- ) Gianni Ferrari --- https://lists.uni-koeln.de/mailman/listinfo

stange longitude

L , the writing could be read as Plane Longitude or the longitude of the plane parallel to the dial and tangent to the Earth's surface. Luckily we are in many to have a fervent imaginationJ Best Gianni Ferrari --- https://lists.uni

strange longitude

Ye Sundial Booke , accompany the image of the sundial of Hawkshead , that are How are you, mortal, did you say? Why, just the same as yesterday? But, questioner, let me ask you, How is the day ? and how are you ? Pag. 80 - and. 1914 - Best Gianni Ferrari

Re: concorso

The Italian diallist Mirco Antiga has asked to inform not-italian sundialmakers on the International Contest Le ombre del Tempo. I attach a file with all the information about it Best wishes Gianni Ferrari shadows_contest.pdf Description: Adobe PDF document

Re: mosaic of wise men under a sundial

In 2002 I wrote a short article on the mosaic that Ronit Maoz is looking for. The article was published in the Italian review Gnomonica Italiana (#3-October 2002) and on NASS-The Compendium ( June 2003): I attach a (little) image of the mosaic. Gianni Ferrari P.S. Using Arabic

A call for help

Does someone knows the email address of Herbert O. Ramp ? (I think an Austrian) He reads The Compendium (a subscriber ?) and has sent me a message asking some explanation. But I don't succeed in answering him in any way. Thanks and excuse me Gianni Ferrari P.S. I have already sent

A call for help

Does someone know the email address of Herbert O. Ramp (I think an Austrian) ? He reads The Compendium (a subscriber ?) and has sent me a message asking some explanation. But I don't succeed in answering him in any way. Thanks and excuse me Gianni Ferrari

Re: Expanded Nodi Shadow Experiment - again

I attach the image of a new kind of Nodus made by Roberto Baggio in a Primary School. The nodus is the eye of the Peace Dove 3 mm in diameter . (orthostyle = 40 cm). The eye is on the extension of the polar style Gianni Ferrari attachment: BaggioR5a.jpg

Dials - Italian hours

. Moreover the common and cheap watches and house clocks ( not the astronomical or marine ones) had errors almost always greater than these values. Gianni Ferrari --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Expanded Nodi Shadow Experiment

Hello Mac, a few minutes ago Roberto Baggio has sent to me two photos of the nodus of his sundial in the square in Varese, taken today 23 m after the true noon. I send them attached to a personal Email. If other are interested to receive them (about 2 Mb), write me. Gianni Ferrari

Re: Dials

Hello Frank, you write Unfortunately, there seem to be only two people in the world who are interested in Italian-hours clocks! I think that the reason for the small dimension of this group is caused to the fact that, in my opinion, the Italian-hours clocks have never existed :-) In a

Re: Expanded Nodi Shadow Experiment

a spherical nodus star-shaped, suspended to a cable (the analemma is 7-8 m high) Gianni Ferrari P.S. The shape of the Baggio's nodus is indeed equal to that of John Carmichael, but Baggio didn't certainly know it (it is not registered to this list) :-) - Original Message

Re: Expanded Nodi Shadow Experiment

and that of the inside ring approaches the center. In these seasons as nodus the shadow of the whole plate is used . Its center is easily located using the symmetry of the structure. Gianni Ferrari attachment: Varese_Nodus.jpg --- https://lists.uni

Re: Expanded Nodi Shadow Experiment

of the hole-as seen by the image) is much greater than 108 (at least 300-500 ) This is not true in the meridian lines that have to work in open air. The brightness of the image in room sundials is too low and cannot be perceived inopen air but only in .. dark rooms :-) Gianni Ferrari

Re: Expanded Nodi Shadow Experiment

I am sorry but the image is not arrived I try again now Gianni Ferrari attachment: nudus1.JPG --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: Expanded Nodi Shadow Experiment

° and the observer sees the hole with axis of 18x 30 '. The ratio R =190 Therefore only under these extreme conditions (1h before the sunset in winter) the spot of light if greatly attenuated. Best wishes Gianni Ferrari P.S. - In Cassini sundial in S. Petronio (Bologna) the ratio R = ( Distance

Re: Sundial Website Ideas

Hello Roger, from the last census only in Italy the sundialsare more then 15,000 :-) Best Gianni Ferrari - Original Message - From: Roger Bailey To: John Carmichael ; Sundial List Sent: Monday, July 17, 2006 7:20 PM Subject: RE: Sundial Website Ideas Hello

Re: McDonald's billboard (A sundial?)

of the orthostyle while they should be come from the foot of the polar style, that is more aloft. Also this seems a false sundial (as that of Harlem), perhaps drawn copying and taking as model a true sundial ( without understanding it). Gianni Ferrari 44° 39' N 10° 55' EMailto : [EMAIL PROTECTED

Re: Is this a sundial?

and their shadows become segments when the Sun is exactly in front of the wall (thing that suggests a wall facing South) . Best Gianni Ferrari - Original Message - From: Robert Terwilliger To: 'Sundial Mailing List' Sent: Friday, June 30, 2006 3:37 AM Subject

Re: church interior dial

The 14 numbers that are in all the Catholic churches refer to the Stations of the Way of the Cross (in Latin, Via Crucis) and don't have anything to do with the hours of the day. (see http://en.wikipedia.org/wiki/Way_of_the_Cross) Gianni Ferrari - Original Message - From: Frans

Sundial of Augustus

ons, whose description certainly would not be slipped to the ancient authors, is only an invention of which no proof exists, as it is clearly shown in the article. Gianni Ferrari

Re: Armillary Dial

n Damascus. Regards Gianni Ferrari 44° 39' N 10° 55' EMailto : [EMAIL PROTECTED]

Re: Reading at a Distance

, 1/500th – 1/400th. So we obtain Hmm = 1.454*Lmt or Hmm = 2*Lmt or Hmm = 2.5*Lmt Where H is the height of the letters in mm and L the distance in meters. Best Gianni Ferrari NOTE Visual acuity is the spatial resolving capacity of the eye, that is the ability of the eye to see fine detail

Re: Astronomy Picture of the Day

during the overlapping with the purpose to separate and not superimpose the different celestial bodies. :-) Best Gianni Ferrari

Re: mosaic sundial

m-shop.com/kreativitaet/astronomie/4260013489858 http://www.mosaik-laden.de/oxid.php/sid/x/shp/oxbaseshop/cl/alist/cnid/fc24185e4816568f1.47286849 Best Gianni Ferrari

Web site

written at the end of the page. Buona Pasqua a tutti ! Happy Easter to all ! Gianni Ferrari

Re: Ceiling Dial?

the two programs attached to Email messages (900 kbs and 2100 kbs). Best Gianni Ferrari 44° 39' N 10° 55' E Mailto : [EMAIL PROTECTED] -

Re: Earliest Sundials

through the same point, "the projection of the North Pole on the plane", but in any part of the work he mentions the possibility to use a polar style. My best wishes for a peaceful New Year Gianni Ferrari 44° 39' N 10° 55' EMailto : [EMAIL PROTECTED]

Re: Wall Declination Measurement

Gianni Ferrari 44° 39' N 10° 55' EMailto : [EMAIL PROTECTED] - Original Message - From: John Carmichael To: carol arnold Cc: Sundial List Sent: Monday, November 29, 2004 2:55 PM Subject: Wall Declination Measurement Hello Carol: (c.c Sundial List) I'm back

R:R:

e this values change with the latitude. A regard Gianni Ferrari 44° 39' N 10° 55' EMailto : [EMAIL PROTECTED]

R:R:

the period of light would be of around 12h 9m and therefore 1 temporary hour would be longer than 1 solar hour. All this is not observable in any of the ancient sundials. Gianni Ferrari P.S. I had sent this message yesterday, but it has not arrived :- (

Danti's numbers

interested I can send 4 photos of the sundials , taken on June 8th 2004 : the images are enough heavy (about 500-700 kb each) Gianni Ferrari

Re: Egyptian obelisks used as sundials?

of Anaximander and Anaximenes, built for different purposes, could only mark the noon or the passage of the Sun on the Southern meridian . Gianni Ferrari 44° 39' N 10° 55' E Mailto : [EMAIL PROTECTED] -

Re: Dawn shadows on an east/west wall

43m 6h 02m 6h 00m Sun's altitude 29.1° 25.7° 23.45° 23.45° Length of the illumination 9h 39m 10h 33m 11h 56m 12h Length of the day 17 06m 24h 00m 24h 00m 24h Gianni Ferrari 44° 39' N 10° 55

Re: Dawn shadows on an east/west wall

I apologize if the table of data arrived is very different from that I have sent . I think that you don't have difficulty to understand it anyway :-) Gianni Ferrari

Re: More on Venus Transit

and prevents the vision of thin details on it. Some friends and I , on 8th June, have seen clearly the disk of Venus on the Sun using a solar filter (naked eye), but we have not succeeded in seeing it using a welding glass. Regards Gianni Ferrari 44° 39' N 10° 55' E Mailto : [EMAIL PROTECTED

Venus Transit

tions to come in Italy! :-) A regard Gianni Ferrari 44° 39' N 10° 55' EMailto : [EMAIL PROTECTED]

Re: When the Transit of Venus Transits the Meridian...

and that with this hole the illumination would be = 0.38 that of the Sun image. Dear Frank this is my answer, but I think that it not the definitive one ! : -) Gianni Ferrari P.S. Of course if someone is interested I can send my two papers attached to an email message -

Fourier series and declination

sults of the development in series to find the declination of the Sun in these cases. From calculationswe have also thatit is a good rule to use mean values calculated at 12.00h (local time)on a period of time around equal to that in which we supposed that the clock will stay in operation. Gianni Ferra

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