Re: Can a sundial disprove Flat Earth?

count for the planet motions in the geocentric system. https://en.wikipedia.org/wiki/Epicyclic_gearing https://en.wikipedia.org/wiki/Occam%27s_razor -- Have Fun, Brooke Clarke https://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html axioms: 1. The extent to which you can fix or im

Goerz sun compass

;The Sundial Goes To War" page 13 Fig 17. https://prc68.com/I/AbramsSunCompassSC1.shtml#Goerz http://www.sundials.co.za/THE%20SUNDIAL%20GOES%20TO%20WAR%20web.pdf -- Have Fun, Brooke Clarke https://www.PRC68.com https://www.end2partygovernment.com/2012Issues.html axioms: 1. The extent to whi

Epistemology was: Is this sundial business 'genuine', or not?

this email. Fundamentally all of science is provisional, i.e. there are no scientific facts.  This allows room for improvement. and is why civilization progressed post Enlightenment. PS The above talk has much more meaning after reading Popper. -- Have Fun, Brooke Clarke http://www.PRC68.com

Epistemology was: Is this sundial business 'genuine', or not?

this email. Fundamentally all of science is provisional, i.e. there are no scientific facts.  This allows room for improvement. and is why civilization progressed post Enlightenment. PS The above talk has much more meaning after reading Popper. -- Have Fun, Brooke Clarke http://www.PRC68.com

Re: Abrams Universal Sun Compass SC-1

Hi Conxita: I read that paper and in it Malcolm says: "The tips of the styluses contained a tiny glass capsule apparently filled with a luminous substance and was presumably used at night but its exact function and method have yet to be discovered." -- Have Fun, Brooke C

Abrams Universal Sun Compass SC-1

hat? http://www.prc68.com/I/AbramsSunCompassSC1.shtml -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: publication on Science of Time, with sundials

o clue how it worked. More about this in the Richard Feynman lectures at Cornell "The.Character of Physical Law". https://www.microsoft.com/en-us/research/project/tuva-richard-feynman/ also the book: Einstein's Clocks and Poincare's Maps: Empires of Time -- Have Fun, Brooke Cl

Re: Golden Ratio and Sundials

film cameras (36 x 24mm) have a ratio of 1.5 the same as most DSLR cameras, yet the most common printer paper aspect ratios are still 1.25 (4x5 or 8x10). But you can get 4x6 or 8x12" paper for an aspect ratio of 1.5. Note all of these are smaller than 1.618. -- Have Fun, Brooke C

Re: Looking for minutes and seconds correction for whole year for Equation of Time plaque

/www.prc68.com/I/StellarTime.shtml -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html Original Message Hi Clark, The Solar Info android app provides the EqT value at all times and also generates the EqT curve at 12:00 for a date

Re: Time question on GPS TIME and leap second.

lock is to make use of a "time" station like WWV or WWVB. I've only heard of one clock model that makes use of the phase modulation that's been on WWVB for many years and it's the La Crosse 404-1235UA-SS. -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2

Re: Time question on GPS TIME and leap second.

ways wrong. The only time source that knows about these things are the time stations, like WWV & WWVB. http://www.prc68.com/I/timefreq.shtml#RSL -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html Original Message A recent arti

Re: Time question on GPS TIME and leap second.

have no idea what year it is. The total number of seconds offset from UTC is transmitted separately so that a GPS receiver can display either GPS time or UTC. Note that the time and position are independent from the year. http://www.prc68.com/I/Trimpack.shtml#WkRlvr -- Have Fun, Brooke Clarke

3D Printer Digital Display Sundial

Hi: https://www.youtube.com/watch?v=78I-A7ikXYU http://www.mojoptix.com/2015/10/25/mojoptix-001-digital-sundial/ http://www.thingiverse.com/thing:1068443 https://www.etsy.com/listing/248715228/digital-sundial -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com

Re: No decision on future of leap seconds

at difference they will be corrected by a gravity meter. I'm on the "Time Nuts" mailing list where very precise time and time measurements are the topic. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts Mail_Attachment -- Have Fun, Brooke Clarke http://www.PRC68.com ht

[OT] Camera Obscura

=tt_trv_gf I've been reading about panoramic telescopes and panoramic sights where the image stays put in the eyepiece when panning in azimuth. Would anyone know of a design for such a camera obscura? -- Mail_Attachment -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partyg

Re: About Cast Away movie...

/Sundial.shtml#SSB It's very difficult to photograph the larger ceiling dial. Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html Brooke Clarke wrote: Hi Ruben: Do you have a still photo of this? Have Fun, Brooke Clarke http://www.PRC68.com

Re: About Cast Away movie...

Hi Ruben: Do you have a still photo of this? Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html ruben nohuitol wrote: Hi, I made a comment about the Cast Away movie analemma at http://www.moviemistakes.com/entry202089 Someone reject the comment

Re: The GPS zero meridian club - a round up

cted GPS. http://www.prc68.com/I/LGBXcsiDGPS.html Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html Douglas Bateman wrote: Many thanks to all who, as typical of the list, sent relevant and interesting posts. I would like to comment on some as follows: IM:

Re: The GPS zero meridian club

eter. http://en.wikipedia.org/wiki/Earth_tide Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html rmallett wrote: On 30/04/2014 17:37, Douglas Bateman wrote: This is a new club consisting, so far, of two members: Frank King and myself. After the

Design of Cards for Campbell Stokes Sunshine Recorder

use the correct card in the correct slot. Winter: 38mm, Equinox: 42 mm, Summer: 33mm http://www.prc68.com/I/CampbellStokes.html -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html --- https://lists.uni-

Design of Cards for Campbell Stokes Sunshine Recorder

use the correct card in the correct slot. Winter: 38mm, Equinox: 42 mm, Summer: 33mm http://www.prc68.com/I/CampbellStokes.html -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html --- https://lists.uni-

Re: Most accurate Sundial in the World

orrections built in. http://www.prc68.com/I/Sundial.shtml#Schmoyer Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html cerculdestele . wrote: Does anyone know if this record has been broken? http://www.engadin.stmoritz.ch/sommer/en/activities/mountain-adventure

Re: Middletown, Calif. LORAN-C Antenna

Hi Rudolf: Thanks very much. Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html R. Hooijenga wrote: I love these little quizzes! The shadow in the May 6 (May 7 my time) 2012 photo is between 160 and 180 meters long. Its direction is about 290

Middletown, Calif. LORAN-C Antenna

t tall or 1350 feet tall. There's a distance scale in the lower left of the Google image. and the shadow can be seen. Is it possible to figure out the tower height and/or the date when the photo was taken? -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partyg

Re: The most 'successful' sundial business - now, or in the past ?

ecause it's based on spending, not results. Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html Alison Shields wrote: Dear "Sundial Mailing List" Members, It might be a very unusual question - but I would like opinions on who (or wha

Re: Leap year

Hi Frank: Can you say more about how to read the photograph you attached? Is there an existing dial that incorporates detection of 29 Feb? Have Fun, Brooke Clarke http://www.PRC68.com http://www.End2PartyGovernment.com/ Frank King wrote: Dear Jos, You ask a good question... Can a sundial

Re: newbie

e Fun, Brooke Clarke http://www.PRC68.com http://www.End2PartyGovernment.com/ karon wrote: *Ok, guys, total Newbie here. I took trig and calculus more years ago than a woman my age would care to admit so, all of this may as well be Greek to me!* * * *Yet, I am fascinated by sundials.* * *

Re: Chinese sundials circa 1280

Hi John & Sara: Thanks for the pointer to this book. Have one on order from Amazon. Maybe it will have some info on my Chinese Compass & Sundial. http://www.prc68.com/I/chinesesdc.shtml Have Fun, Brooke Clarke http://www.PRC68.com http://www.End2PartyGovernment.com/ John Picka

Re: solar compass

e used for Navigation: http://www.prc68.com/I/AC_D500.shtml http://www.prc68.com/I/S5807.shtml http://www.prc68.com/I/MD1.shtml http://www.prc68.com/I/Nav.shtml Have Fun, Brooke Clarke http://www.PRC68.com http://www.End2PartyGovernment.com/ Donald Christensen wrote: A few months back on thi

Re: Shadow Forensics

Hi Brent: You can go the other way, that's to say if you know the location you can determine two possible date-time pairs. http://www.prc68.com/I/Nav.shtml#Bg Have Fun, Brooke Clarke http://www.PRC68.com Fred Sawyer wrote: See the Obsession episode from season 2 of NUMB3RS. I cons

Re: varying speed?

t the image to a very good star catalog thus averaging the seeing of hundreds of stars and get orders of magnitude better time/space resolution. http://www.prc68.com/I/StellarTime.shtml Have Fun, Brooke Clarke http://www.PRC68.com Kevin Karney wrote: Brent If you measure the transit of

Re: Solar Position Calculator

Hi Alexei: http://www.willbell.com/almanacs/almanac_mica.htm Have Fun, Brooke Clarke http://www.PRC68.com Alexei Pace wrote: Hello Brooke, From where is the software available as I cannot find a 'download' link? Regards, Alexei On Wed, Feb 2, 2011 at 10:03 PM, Brooke Clarke &

Re: Solar Position Calculator

Hi Kaarigar: The USNO has the MICA software package that does this and much much more. http://www.usno.navy.mil/USNO/astronomical-applications Have Fun, Brooke Clarke http://www.prc68.com/I/Nav.shtml triplederby100-pro...@yahoo.com wrote: I had asked a question earlier about how to design a

Re: stop the earth

string is that this is a close up of one slot, nominally 101 W. Have Fun, Brooke Clarke http://www.PRC68.com R Wall wrote: Hi Brent, The following links shows a photo taken of five geostationary satellites (using 5 hour exposure). I would have thought that there would be more than five sate

re: stop the earth

harder problem was and is finding the Lattitude. This is because of the wobble of the poles, see: * Latitude by Carter & Carter * http://www.prc68.com/I/UkiahObs.shtml -- Have Fun, Brooke Clarke http://www.PRC68.com --- https://lists.uni-koel

Re: Light Based Geolocation

/UkiahObs.shtml Have Fun, Brooke Clarke http://www.PRC68.com Roger Bailey wrote: > Hi Brent, > > Would that it were that simple. Longitude still requires an absolute, not > relative time fix. You still need to know the time and longitude from > Greenwich. Sunrise and noon are relativ

Light Based Geolocation

. I'd like to learn more about what data the tags store and how smart they are. For example is there a micro controller in the tag that make computations or is it just a data logger? -- Have Fun, Brooke Clarke http://www.PRC68.com ---

Re: DST Misconceptions

Hi Dick: Yes, Both Rachel and the author of the book about DST like it, without any of the official reasons given for it. They both agree it does tend to cause people to spend more money. Have Fun, Brooke Clarke http://www.PRC68.com kool...@dickkoolish.com wrote: > Even if the myths

Re: DST Misconceptions

Hi: Here's a video that busts the myths surrounding the benefits of DST. Rachel Maddow- Daylight-saving time explained http://www.youtube.com/watch?v=Z48Mg0dl4Gw Have Fun, Brooke Clarke http://www.PRC68.com --- https://lists.uni-koe

Re: A Wonderful Thing

Hi John: I see the main wall dial, the ball and chain, the noon mark and something else. There's an arrow from the bird's beak to the support for the chain. What's it for? Have Fun, Brooke Clarke http://www.prc68.com John Carmichael wrote: > Look at this wonderful old

Re: Wikipedia Sundial Page

Hi John: The Wiki orginazation has setup the structure of their pages and anyone can add or change the content. At the top of the page there are tabs, one of which is History. If you mouse over the links on that page you will see many names/handles. Have Fun, Brooke Clarke http://www.prc68

Re: Hi Def Photo settings?

ou need to crop the image. If you did it by changing the pixel counts the image would become distorted. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com John Carmichael wrote: > Hello to the webmasters & photo buffs amongst us: > > > > In this ne

Ceiling Dial Wrong a Hour

Hi: Now that the dates when DST and ST change are different, my ceiling dial needs to be updated. Just now the spot was in a place where there's no markings and the marking for noon is about an hour away. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java

Re: Bicycle Sundial?

Hi Thad: More interesting would be to come up with a way that the shadow of some part of the bike would cast a shadow that could be used to tell time. Not sure how to go about it, but would be cool. Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com

Re: Best Photos for Hi Def TV

ect a flash drive to my progressive scan TV? Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com John Carmichael wrote: Hello to the Photo & Video experts in the group: I have a technical quest

Re: Google Earth accuracy

error.  see: http://www.pacificsites.com/~brooke/Loran-c.shtml click on the station name in the table for the Google image. Have Fun, Brooke Clarke Roger W. Sinnott wrote: List: I'm sure Mike meant that the Greenwich Meridian Line is about 5" west, not 5' west, of where it is

Re: Dipleidoscope for sale on ebay

Hi Mac: The dipleidoscope is mounted on a base and seems to be designed for use at some specific location. Is this the case? Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Mac Oglesby wrote

Re: Seeing in 2006

smart" clock would be able to program itself to insert the leap second at the proper time, but I'm not aware of any clocks that use the bits. For more on observing the leap second see: http://www.leapsecond.com/notes/leap-watch.htm Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC

Re: Leap seconds - UK opposes change

need them. Of course a precision sundial would no longer work over long periods of time. Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Mike Cowham wrote: Dear Shadow Watcher

Re: Ceiling Dial (was: Satellite Outage)

get Sun the year around. I've also epoxied the mirror to the window sill so that it will not wander. By pressing down on the window sill the spot can me moved dramatically even though the sill feels solid. Having Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http:

Re: Deriving Lat & Lon from Sunrise & Sunset

I guess there are not tracking "Hollywood" animals, probably only those in the "wild". Have Fun & THANKS very much, Brooke Clarke, N6GCE R.Hooijenga wrote: Hello sundialeers, I think I could guess the basics behind the method Brooke describes. From sunrise an

Deriving Lat & Lon from Sunrise & Sunset

to 1 degree). Is there a procedure for doing this? Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com -

Re: Ceiling Dial Placing Mirror (was: Satellite Outage)

at: 39:11:24.5855 N Lon: 123:09:50.4842 Ele: 890 feet Thanks, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com -

Re: Fwd: Re: Duplicate messages

Mac: You might want to do an experiment removing Thibaud and then sending a test message? Hope this helps, Brooke Clarke, N6GCE Th. Taudin Chabot wrote: Brooke, I got this message 3 times! 1 without and 2 with the virusscanmessage at the end. These 2 had some extra lines at the top of the

Re: Duplicate messages

below.  Most likley one of the Sundial list subscribers is using them as an ISP.  G2 solutions is improperly reflecting the email back to the list causing the duplicate postings. Have Fun, Brooke Clarke 04/14/05 13:47:11 Input The Received: headers are the important ones to read My comments are just

Ceiling Dial (was: Satellite Outage)

? The mirror on the windowsill is at: 123:09:50.5 N, 39:11:24.6 W, 900 feet above mean sea level. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com -

Satellite Outage Ceiling Dial

o get more data points. You can see a photo of the ceiling at: http://www.pacificsites.com/~brooke/Sundial.shtml#SSB Eventually there will be noon marks for 12:00 and 1:00 made by marking using a clock. Part of the 1:00 PST noon mark is in the photo on the above link. Have Fun, Brooke Clarke,

Re: Satellite Outage Ceiling Dial

ling that they experience the same outage due to the Sun. Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com -

Ceiling Dial?

ermine the room and mirror geometry. Has anyone done this? Thanks, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com -

Satellite Outage Ceiling Dial

he above dozen or so points? Having Fun, Brooke Clarke, N6GCE w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com -

Re: Updated & Revised Website

with the 4.01 spec. So you might want to get the free Netscape 7.2 just to use the Composer. Have Fun, Brooke Clarke, N6GCE -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com tony moss wrote: Fellow Shadow Watchers

Re: EarthDial and PDF files

Hi Ken: I started looking into what was needed with my Logitech Pro 4000 web cam, and could not find the software to upload the images. Do you know where to get it? Have Fun, Brooke Clarke, N6GCE htp://www.PRC68.com [EMAIL PROTECTED] wrote: Hi Everyone,    Has anyone made the EarthDial

Re: An interesting time link

n is maybe 100 simple parts on a more conventional machine. Have Fun, Brooke Clarke, N6GCE http://www.PRC68.com tony moss wrote: Jim Tallman contributed: Despite being just a bit off-topic, here is a time link that I thought several of you might like. It is about a 10,000 year clo

Re: Test Message & Sun Spots

Hi Les: You are correct in the date of the last message. Slightly off topic"  There's two huge spots n the Sun now.  For more see: http://www.spaceweather.com/ Have Fun, Brooke Clarke, N6GCE http://www.PRC68.com Les Lombard wrote: Since 20 Oct 03 I have not re

Gazing Balls

My local store that sells sundials also sells garden gazing balls and stands to hold them. See: <http://www.windandweather.com/store/Yard___Garden___Gazing_Balls?&page_number=1> Have Fun, Brooke Clarke heiner thiessen wrote: Dear shadow watchers, I am hoping to make a glob

Re: Great clock value

Would you send my the photo? I could only find a very small photo on their web page. Thanks, Brooke Clarke Mac Oglesby wrote: Hello All, This is off topic, but I just bought a beautiful large wall clock which looks like a great value. It's about 20" in diameter and has a s

Re: Fw: Sundial Carpet

Hi John: It's been my experience that carpet has a very short life, and when it comes time to replace it, the powers that be may decide to go with a less expensive "plain" carpet.  Some other approach may have a longer life. Have Fun, Brooke Clarke John Carmichael wrote:

Possible Sundial layout item on eBay?

Although the seller thinks this might be part of a surveying plane table setup, it doesn't look like any that I have seen, but might have some Sundial relatinship. Does anyone recognize it? <http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2538463447&category=361>

Re: Using a Dipleidscope

s 11:55 AM. Gordon At 11:16 3/23/03 -0800, Brooke Clarke wrote: Hello: Can someone tell me the California (PST) time when the Sun is South for the next few days. I'm at 123:09:50.548 W, 39:11:24.692 N. Maybe the Dipleidscope can be used as a reflecting ceiling dial. Brooke Clarke -

Re: Using a Dipleidscope

Can someone tell me the California (PST) time when the Sun is South for the next few days. I'm at 123:09:50.548 W, 39:11:24.692 N. Maybe the Dipleidscope can be used as a reflecting ceiling dial. Brooke Clarke -

Re: Using a Dipleidscope

Working with a desk lamp I find that there are two images, one off of the cover glass that tilts with rotation of the Dipleidscope about the common mirror axis and another reflection that remains constant as the Dipleidscope is rotated. To see the constant reflection you need to move your e

Re: Using a Dipleidscope

Dipleidoscope, and the cost? Sorry, but I don't know how to use one---yet. Best wishes, Mac Oglesby Hello: I got a Dipleidscope, but no matter how I orient it don't see the image of the Sun. What's the trick? I'm at 39N 123W. http://www.pacificsites.com/~brooke

Re: Using a Dipleidscope

Mac Oglesby Hello: I got a Dipleidscope, but no matter how I orient it don't see the image of the Sun. What's the trick? I'm at 39N 123W. http://www.pacificsites.com/~brooke/Dent.html Thanks for any pointers, Brooke Clarke - - -

Using a Dipleidscope

I got a Dipleidscope, but no matter how I orient it don't see the image of the Sun. What's the trick? I'm at 39N 123W. http://www.pacificsites.com/~brooke/Dent.html Thanks for any pointers, Brooke Clarke -

Re: Frames on web pages?

m with frames and that is you can not > > bookmark, link or paste a page URL into an email. On my web pages I > > copy and paste the navigation links. > > > > Thanks, > > Brooke Clarke > > One useful trick that helps with that: In Netscape (IE, too, but may be a

Re: Frames on web pages?

Hello Anselmo: I can't comment on the issue of non compatibly, but in my opinion there is a much larger problem with frames and that is you can not bookmark, link or paste a page URL into an email. On my web pages I copy and paste the navigation links. Thanks, Brooke Clarke Anselmo

Chinese Sundial & Comapss

Hello: Does anyone have information on the age of this design? http://www.pacificsites.com/~brooke/chinesesdc.shtml Thanks, Brooke Clarke -

Re: My New Website

Hi John: Before you do that, you might ask those who had problems what version of Acrobat they are using. If the version is too old that will cause problems. Brooke John Carmichael wrote: > Hi David > > Good to hear from you! I'm sorry about the download problem. It appears that > some people

Re: Need Sundial Review Website

NOBLE COLLECTION 21731-B Filigree Ct. ASHBURN, VA 20147 US 703 858 4340 Fax- 703 858 4350 Technical Contact: HABIB, CHRISTINE-WN-JGEG (CHJ258) [EMAIL PROTECTED] NOBLE COLLECTION 21731-B Filigree Ct ASHBURN, VA 20147 703 858 4340 Brooke Cl

Re: Oct 2002 Poptronics LED Sundial

t;. It's about using photo transistors and LEDs to remotely indicate the time. Brooke Clarke -  

Oct 2002 Poptronics LED Sundial

The October 2002 issue of Poptronics on pages 53 through 56 has an article "Sundials --- or the shadow tells all". It's about using photo transistors and LEDs to remotely indicate the time. Brooke Clarke -

Re: Compass Variations for True North (Polaris)

Hello Judith: The Earth's magnetic field is in a constant state of change so there is no simple answer to your question. Every 5 years or so the World Magnetic Model is updated. This model will tell you what the magnetic field is for a given location and date anywhere on the Earth's surface (but

Re: Beware messages from Colonial Brass

d not come from Colonial Brass. Have Fun, Brooke Clarke John Carmichael wrote: > My Norton Antivirus just caught a virus attachment on an email from Colonial > Brass, makers of bogus sundials. I don't think they like me! > > John > > John L. Carmichael Jr. > Sundial

Re: Heliochronometer by Homan

her US Patents? But as you say apparently one can't > search for the inventor on-line at that date. I'll have a look, in case, for > other UK ones using good old paper-based technology! > > Andrew James > N 51 04' W 01 18' > > -Original Message- > From:

Re: Heliochronometer by Homan

ttp://164.195.100.11/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/srchnum.htm&r=1&f=G&l=50&s1='946,223'.WKU.&OS=PN/946,223&RS=PN/946,223> Have Fun, Brooke Clarke PS the "<... >" should keep the link from bre

Re: Testing our web

Hi Anselmo: I can see the Spanish version OK using Netscape 4.79. Brooke Clarke Anselmo Pérez Serrada wrote: > Dear dialists, > > I am testing a minimal-preliminary-not-yet-official web page > for the Spanish > Sundial Society. At the moment you can find it (mind yo

Re: Polar Alignmen

Hi Richard: It may not be that simple. On an astronomical telescope you can align the finder scope to the main scope by looking at the same star and using a cross hair eyepiece (which can be checked by rotation). Fixing a finder scope to a mechanical sundial may present an alignment problem.

Re: Pilkington & Gibbs

privatized, but the patent number should work on the USPTO page. http://www.pacificsites.com/~brooke/SD_Pat2.htm If you will give me a number I'll give it a try. Thanks, Brooke Clarke John Pickard wrote: > Brooke, > > A couple of years back, I spent a lot of time at IP Australia (i.e.

Re: Pilkington & Gibbs

Hello Mike: Can you tell me the patent number? The USPTO has all issued patents available free on line. Does the UK have a similar service? Thanks, Brooke Clarke The Shaws wrote: > I have recently become the proud owner of a Pilkington Gibbs > Heliochronometer:- > "Globe

Monitor Shut Down Problems

Hello Tony: Starting a couple of days ago my monitor has gone into the power saver mode at random times and the only way to recover is to reboot. The screen is black and the power light changed from green to yellow. The problem only occurs during browsing and most frequently during operations re

Re: Hilger & Watts

Hello Tony: I have what I believe to be a seismograph made by Hilger & Watts and am also interested to learn their history and present whereabouts. Thanks, Brooke Clarke Tony Moss wrote: > Fellow Shadow Watchers, > > I recently acquired a Hilger and Watts 'centres

Re: diameter of reflected sun image

up about 20 feet. By using a watch that was set by WWV and a template with a number of ellipses made on white paper I tracked the ellipse until the noon alarm went off then drove a brass tack into the wood floor.  It took a few years but the result was a very accurate noon mark. Have Fun

Re: Magnetic Declination.

Mike: Have a look at: http://www.pacific.net/~brooke/Sensors.html#Earth's Magnetic shamless plug. There is a web magnetic model that depends on lat,lon, date. Have Fun, Brooke Mike Cowham wrote: > Dear Expert Friends, > I have yet another question that I am sure that one of you will

Re: Shadow Sharpener

piece of paper with a number of ellipsis and a small hole in the center.  Using a watch synchronized to WWV and the beeper turned on, I tracked the sun's image and stopped when the watch sounded.  Then just drive in a brass tack. Have Fun, Brooke Clarke Gordon Uber wrote: Roger, thank you for yo

Re: used Theodolite

Hello: In the Allen Precision Equipment (800 241-6223) Spring '99 catalog on page54 they list a Digital Theodolite with LCD readouts for US$ 1695.00 new. It is a 20 second instrument. http://www.allenprecision.com. Have Fun, Brooke http://www.pacific.net/~brooke/Sundial.html http://www.pacifi

Dialing books from overseas

I found a reference to a German book on dialing on the internet. When I went to my local bookstore ( I am way out in the country) they were not able to get the book. Does the NASS have dialing books available from other ocuntries? Although I do not read german, I still would like to have the

Sundial using optics ?

In the few books I have on sundials, they all seem to depend on either the sun's shadow or reflection. I was searching patents (class33/269=30 patents '76-'95, class 356/130.01=2 patents '76-'95) and found a few that used cylindrical plastic/glass lenses. Does anyone know about dials that are