Re: Impact of making instruments out of boxwood
Box is also a preferred wood for end grain wood engraving, used for highly detailed images in books and magazine. Wood engraving on end grain has more definition than a woodcut which is in plank grain and does not tend to use box. Box is now somewhat expensive. SimonIllustrating Shadows | | | | || | | | | | Illustrating Shadows Material for sun dials, with booklets, pamphlets, spreadsheets, CAD and other visual depictions using programming, conventional and legacy programming with tabular output, case studies, guides, and the like. Lino (linoleum) cuts and printing, wood cu | | | | Phoenix AZSilver City NM Sent from Yahoo Mail on Android. witch spells werse than mee. it's forlt. It's spelling is knot Werth a dam, blame itt an knot m. attached shood beee a spell checker, if an droid can find eet. On Thu, Sep 7, 2017 at 5:48, Patrick Vyvyan wrote: --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: PS: Looking for minutes and seconds correction for whole year for Equation of Time plaque
when I said supplementalShadows.pdf I meant to type appendix-main-appendices.pdf sorry. However my averaging fir 4 years is avtually, now I look at it, in the Excel sheet illustratingshadows.xls specifically the "astroEOT" sheet, however I did the averaging for mid month so as a turnkey it may not help. But do look at that sheet as it is easy to modify. The sheet is orotected, so do ALT-T then P then P again to unprotected it. simon Sent from Yahoo Mail on Android On Wed, Jan 25, 2017 at 17:21, Kenneth R clark wrote: I had an error message from AOL Sorry for no subject line and my files were not sent. Let me retry with this account. Hi everyone, I am working onmy Equation of Time plaque for my aluminum cross sundial. All the instructions and graphics and EQT willbe on an 8 ½” diameter ½” aluminum plate. I do not want to use the standard graph found on many sundials butinstead a chart for the whole year, mins and secs, to add or subtract totalcorrection to get watch time. I do nothave much room for detailed instructions. I looked atdifference sources for the chart and would like to verify the most accurate timesto use the four year leap year cycle for a church at 40.1526N, 76.6038W. I have looked at the Solar Noon calculator,Sonne and Shadows-(cannot input decimal degrees?) Are there other sources or spreadsheet programs? I like to conveythat sundials are accurate. I envisionthat a person will wait till the shadow is on a line and the person will knowwhat time it is suppose to be even though this type of sundial may not be designfor precision. I made a quickdrawing. There will be some type of sunimage at the top and a logo at the bottom for the location. The chart in the center is from anotherproject that I did just to see how it would look and if the printing is large enoughto read. I would have to change theinputs to standard time for the whole year. I have also attached a picture of the sundial. I just want toknow if I am using the right times and would appreciate any comments orsuggestions. Thanks very much Ken Clark Elizabethtown,PA --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Looking for minutes and seconds correction for whole year for Equation of Time plaque
there are many excellent sources for that which you seek. my own offering would be my illustratingshadows.xls on my Web site which has an astronomically appropriate worksheet, decimal lat and long are used, not minutes and seconds. And I have also averaged 4 years of them in supplemental Shadows.pdf also on my Web site:- www.illustratingshadows.com Simon Sent from Yahoo Mail on Android On Wed, Jan 25, 2017 at 17:21, Kenneth R clark wrote: I had an error message from AOL Sorry for no subject line and my files were not sent. Let me retry with this account. Hi everyone, I am working onmy Equation of Time plaque for my aluminum cross sundial. All the instructions and graphics and EQT willbe on an 8 ½” diameter ½” aluminum plate. I do not want to use the standard graph found on many sundials butinstead a chart for the whole year, mins and secs, to add or subtract totalcorrection to get watch time. I do nothave much room for detailed instructions. I looked atdifference sources for the chart and would like to verify the most accurate timesto use the four year leap year cycle for a church at 40.1526N, 76.6038W. I have looked at the Solar Noon calculator,Sonne and Shadows-(cannot input decimal degrees?) Are there other sources or spreadsheet programs? I like to conveythat sundials are accurate. I envisionthat a person will wait till the shadow is on a line and the person will knowwhat time it is suppose to be even though this type of sundial may not be designfor precision. I made a quickdrawing. There will be some type of sunimage at the top and a logo at the bottom for the location. The chart in the center is from anotherproject that I did just to see how it would look and if the printing is large enoughto read. I would have to change theinputs to standard time for the whole year. I have also attached a picture of the sundial. I just want toknow if I am using the right times and would appreciate any comments orsuggestions. Thanks very much Ken Clark Elizabethtown,PA --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Re:
Yes, please download. illustratingshadows.xls from Illustrating Shadows and look at some of the subsheets. Use the insert chart feature in excel. Look at my h-dial-analemma worksheet which uses Cartesian coordinates creating the familiar figure of 8. Warning... aspect ratio is not preserved, that is why I also add two orthogonal lines as in "h dial" worksheet, so you can stretch or squeeze the chart until the lines intersect at 90 degrees. My web also has notes on messing with excel. Also consider Kingsoft. Caution with open office however because I once got malware from the official site, not detected by the virus checker I used back then, which was a top of the line. Simon www illustratingshadows . com Sent from Yahoo Mail on Android On Sun, Jan 22, 2017 at 9:46, Michael Ossipoff wrote: I mean, just using Excel, without using VBA. Michael Ossipoff On Sun, Jan 22, 2017 at 11:45 AM, Michael Ossipoff wrote: 1. I don't understand how a spreadsheet's rectangularly-arranged table of values is a problem for designing circular things. The values calculated and saved in that table can represent polar co-ordinates as well as anything else. 2. But here is my question that motivates this reply: Is it possible (without purchasing or downloading additional software) to print out graphics from Excel? ...to calculate, in Excel, co-ordinates of points along some curve, and then print-out the curve? ...useful for drawing a map, or a sundial, or any of lots of other things. Michael Ossipoff 2017-01-20 12:26 GMT-05:00 graham stapleton via sundial : Diese Nachricht wurde eingewickelt um DMARC-kompatibel zu sein. Die eigentliche Nachricht steht dadurch in einem Anhang. This message was wrapped to be DMARC compliant. The actual message text is therefore in an attachment. -- Forwarded message -- From: graham stapleton To: "sundial@uni-koeln.de" Cc: Date: Fri, 20 Jan 2017 17:26:06 + (UTC) Subject: Circular Spreadsheet Software Is there any freeware (or at least inexpensive software) that can do in a circle that which Excel does in a quadilateral? Apart from variable numbers of radii and concentric circles, numbers and text need to appear in the circles. I've found something that does the first part, (albeit PDF) but not the latter. Thank you. -- - https://lists.uni-koeln.de/mai lman/listinfo/sundial Links in the message | | Illustrating Shadows | --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Circular Spreadsheet Software PS
I have given up on my Android spell check, sorry for typos. I am beginning to long for the days of the Creed 7B teleprinters, at least they didn't "correct" spelling. Simon Sent from Yahoo Mail on Android On Fri, Jan 20, 2017 at 16:20, Steve Lelievre wrote: Graham, I'm not sure that I understand your question fully, but if you're trying to do something like the attached and you're using Windows, try Inkscape. https://inkscape.org/ I'm fairly new to it and am finding it a little awkward to use in some respects, but I'm gradually getting used to it. The nice thing is, it's free. Steve On 2017-01-20 9:26 AM, graham stapleton wrote: Is there any freeware (or at least inexpensive software) that can do in a circle that which Excel does in a quadilateral? Apart from variable numbers of radii and concentric circles, numbers and text need to appear in the circles. I've found something that does the first part, (albeit PDF) but not the latter. Thank you. --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Circular Spreadsheet Software
I would need more info. Freecad, Nanocad, Power draw are good 2fd cad ststems, programmable, and free. Power draw has no trig functions but I wrote some for it, see my website. Illustrating Shadows | | | | || | | | | | Illustrating Shadows Material for sun dials, with booklets, pamphlets, spreadsheets, CAD and other visual depictions using programming, conventional and legacy programming with tabular output, case studies, guides, and the like. Lino (linoleum) cuts and printing, wood cu | | | | also, Progecad is free for non commercial use and is programmed with LISP. My web site has sundial code for all the CAD systems above. While they are primarily 3d, OpenScad and even Blender may be an option, code on my site also. consider downloading Programming Shadows, some 400 pages with examples for many free or low cost systems . it us free and on my website. Simon Sent from Yahoo Mail on Android On Fri, Jan 20, 2017 at 16:20, Steve Lelievre wrote: Graham, I'm not sure that I understand your question fully, but if you're trying to do something like the attached and you're using Windows, try Inkscape. https://inkscape.org/ I'm fairly new to it and am finding it a little awkward to use in some respects, but I'm gradually getting used to it. The nice thing is, it's free. Steve On 2017-01-20 9:26 AM, graham stapleton wrote: Is there any freeware (or at least inexpensive software) that can do in a circle that which Excel does in a quadilateral? Apart from variable numbers of radii and concentric circles, numbers and text need to appear in the circles. I've found something that does the first part, (albeit PDF) but not the latter. Thank you. --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Astrolabes
I have two commercial planispheric astrolabes. The Norman Greene one in the puzzler link below looks as if it might not be accurate, however it is easy to read in full sun. Another I have is clearly more accurate but in full sun rather hard to read. Mr Morrison's work is definitive, excellent. My DeltaCAD macro for astrolabes (planispheric) will let you check designs. I only address the sun, not other heavenly bodies. My main spreadsheet also provides planispheric astrolabe design data. I also wrote an idiot's guide to designing them. www.illustratingshadows.com and all that stuff is free. Simon Sent from Yahoo Mail on Android On Thu, Dec 22, 2016 at 6:09, Patrick Vyvyan wrote: First post here, so I don't know if I'm doing it right! Here are a couple of links to reproduction astrolabes, but I have no idea as to their precision: http://www.puzzlering.net/astrolabe.html http://www.astrolabeshop.com/us/astrolabes-page1.htm Some people with considerably more skill than me have made their own, and the level of accuracy looks very superior. That said, some have taken hundreds of hours of work! Have a look at the site of the late James E. Morrison for some fascinating examples: http://www.astrolabes.org/pages/individual.htm Best wishes and season's greetings to all! Patrick Patrick Vyvyan Presidente Corporación Cultural de Putaendo On 22 December 2016 at 09:24, Dan-George Uza wrote: Dear group, While visiting the Barcelona CosmoCaixa this spring I saw a wonderful looking astrolabe on display in the science museum gift shop. It is the one listed below: http://www.antiquus.es/p-172/ Orientacion-y-Medida/ Astrolabio/Astrolabio- Arsenius-20-(dos-latitudes) This brass plated astrolabe measures 20 cm / almost 8" and it comes with two base plates for two different latitudes (41 and 45 degrees). I was very tempted to buy it but after doing some research back home I found that there are some inaccuracies in the rete and alidade design. They are pointed out in the link below (in Spanish). http://www.oagarraf.net/ Comunicacions/ASTROLABI/INDEX% 20ASTROLABI.html Can you sugest other working astrolabes in this price range? Dan Uza -- - https://lists.uni-koeln.de/ mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
