that their method compares well to other
linear Regula Falsi methods.
Michael Ossipoff
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
is the azimuth
circle passing through your desired azimuth, and solving for the h that
would achieve that.
If that's workable, then it could have the advantage that h only appears
once in the altitude formula.
I apologize in advance for any algebraic or copying errors.
Michael Ossipoff
Sorry, I accidentally wrote h = , when I meant sin h = , at the
beginning of the formula for h, given Az, Lat, and dec.
Michael Ossipoff
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
I'm sorry--another typo:
I meant to say:
If your input azimuth is west of south, then h and its sine must be
positive.
If your input azimuth is east of south, then h and its sine must be negative
I really didn't mean to post so much, but I wanted to correct those typos.
Michael Ossipoff
is clear.
Ok, I don't think there will need to be any more fixes or corrections by
me.
Again, sorry about the omissions and typos, and the necessary corrections
and fixes.
Michael Ossipoff
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
corresponding to some particular value of dec, at some particular latitude
Lat.*
*And yes, _lots_ of people at this list know that. I'm not posting
something new. But I just wanted to mention it because I haven't seen it
in the answers so far.*
*Michael Ossipoff
won't be shaded by a building.
Michael Ossipoff
-- Richard Langley
On Saturday, January 31, 2015, 31, at 11:05 AM, John Goodman wrote:
* Dear dialists, * * Does anyone know a formula for calculating the hour
angle given the azimuth, declination, and latitude? * * I’d like to know
the time of day
.
--
Michael Ossipoff
If intened azimuth is north of the east-west line, then cos h tan dec
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
at that Compendium article, and tell me if it
says anything that supports the abovequoted statements--and, if so,what it
says?
I'd appreciate it if you'd paste its words on that matter into a post here,
or an e-mail to me ( at email9648...@gmail.com).
thank you
Michael Ossipoff
~ 26N, 80W
The other of the 2 Reclining-Declining formulas listed in the notes, at the
bottom of the wikipedia Sundial article, likewise gives correct answers.
Again, using:
Lat = 51.5
Incline = 45
Decline direction = 45 degrees left of south
...The Mayall Mayall formula, in the article's notes, for
changes or improvements to that
Wikipedia article's Reclining-Declining section, or comment on it at that
article's Talk page?
Michael Ossipoff
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
previously
published be at that introductory article?
Michael Ossipoff
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
might mistakenly be judged
as incorrect for that reason.
Michael Ossipoff
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
Additionally, Mayall Mayall's formula (shown in the notes at the bottom
of the wikipedia Sundial article) for the angle between the substyle and
the line for noon, gives the right result for:
Lat = 51.5
Inclination = 45
Declination = 45 degrees left of south
Michael Ossipoff
I should add that the correct result described above, with Mayall
Mayall's formula for the angle between the substyle and the line for noon,
is gotten when the decline-direction (D) is measured from north.
So D is the azimuth that the dial is facing.
Michael Ossipoff
any statements without citation,
but the abovequoted statement is in the wikipedia Sundial article without
any citation.
Evidently the wikipedist who re-posted that statemet wants the wikipedia
Sundial article to remain a laughingstock.
Michael Ossipoff
~ 26 N, 80W
meet the requirements in
this posting’s subject-line. Probably not, I guess. And, even if it could,
it would probably require a novel, unfamiliar, complicated
reading-method—unsuitable for a public dial.
Michael Ossipoff
---
https://lists.uni
.
.
…but would take longer to build than a plain 2-sided translucent
Equatorial, or Vertical Declining, or Reclining-Declining dial.
.
Michael Ossipoff
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
Richard--
Thanks; that's in agreement with how we all perceive summer and winter.
I'd say that the astronomers and the newscasters and radio-personalities
should listen to the meteorologists.
Thanks again
Michael Ossipoff
26N, 80W
On Thu, Jun 11, 2015 at 11:39 AM, Richard Mallett
postmas
.
Thanks to NASS and to Fred Sawyer for those images of the Universal
Analemmatic sun-compass.
Michael Ossipoff
26N, 80W
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
a question and
gotten an answer today.
Michael Ossipoff
Patrick--
Thanks for the reply.
You wrote:
Far better to contact the author, (or here NASS) to get permission for what
you want to do
[endquote]
Yes, and that's what my posting was doing
Though I didn't write directly to official NASS e-mail
heard only
good things about Australia and Scandinavia.
Michael Ossipoff
26N, 80W
- Reply message -
Fra: John Pickard john.pick...@bigpond.com
Til: sundial@uni-koeln.de sundial@uni-koeln.de
Emne: Aurora, the beginning of the arrival of Dawn
Dato: tor., juni 11, 2015 01:30
Hi
the astronomers and the broadcasters who quote them)
knows that, by the time June 21 arrives, it has already been summer for a
long time.
Michael Ossipoff
26N, 80W
On Wed, Jun 10, 2015 at 7:30 PM, John Pickard john.pick...@bigpond.com
wrote:
Hi Michael,
You are making life far too complicated
.
Michael Ossipoff
On Tue, Jul 28, 2015 at 7:06 AM, Thibaud Taudin Chabot tcha...@dds.nl
wrote:
So it is actually the same as a window sundial but more or less in a
horizontal position and doesn't project its hourlines on a surface to read
time.
At 12:47 28-7-2015, Robert Terwilliger wrote
Accidentally omitted words:
I meant to say, referring to the 2-sided Translucent Flat Dials,
...intended to be read from both sides, regardless of which side is
illuminated.
Michael Ossipoff
On Tue, Jul 28, 2015 at 7:06 AM, Thibaud Taudin Chabot tcha...@dds.nl
wrote:
So it is actually
I should add: Didn't someone say that the oldest sundial known was a
Chinese Equatorial Dial marked for Equal Hours?
Anyway, in Europe, equal hours have been in use for, what, around 700
years? But, if I correctly remember what i read, Temporary Hours were in
use in classical and ancient times,
, it seems to me that finding what
percentage of the day is over, and how much or how little remains, seems a
bit pessimistic, and maybe not a good way to name the time of day. ...but
I realize that it had practical importance in agricultural societies.
Michael Ossipoff
On Mon, Jul 27, 2015 at 5
accurate than water-clocks?
Michael Ossipoff
On Tue, Jul 28, 2015 at 11:58 PM, Roger Bailey rtbai...@telus.net wrote:
Hi Michael and all,
Temporal or Antique hours co-existed with equal hours from way back,
thousands of years. It didn't take a technological device like a clock
that that's a big disadvantage of Altitude Dials--their
inaccuracy around noon, just the time when people would make lunch
appointments.
Michael Ossipoff
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
or ceased to shade the fishing-spot at a certain solar azimuth.
Michael Ossipoff
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
)
1959: Tarzan the Ape Man (Gordon Scott)
Look at the synopses of those movies. Maybe one of them will have something
familiar from the movie of interest.
When you find the right one, or some possibilities for the right one, check
to find out if it's on YouTube.
Michael Ossipoff
On Sat, Jul
to multiply by
sec Alt than to divide by cos Alt.
sec Alt can be estimated directly from the shadow-casting object and its
shadow, or it can be gotten from
tan Alt, which might be easier to measure, or easier to judge directly from
the object and its shadow.
Michael Ossipoff
On Sun, Jul 19, 2015 at 2
.
But, as an approximate measure of duration, where exact time-of-day isn’t
needed, the method should be satisfactory anytime.
Though I tested it a few times, I only actually *used* it on that one
occasion at the beach.
Michael Ossipoff
26N, 80W
On Sun, Jul 19, 2015 at 12:32 PM, Barry
on this street is south).
Michael Ossipoff
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
linked to, with the line-drawings and comments
about a few map projections, the author of that didn’t even mention any
elliptical projections. And, basically, he was just expressing his
allegiance to current fashion.
Michael Ossipoff
On Sat, Oct 24, 2015 at 6:22 PM, Dan-George Uza <cerculd
ed in 1805, by a teacher in Germany,
and has been very popular.
Michael Ossipoff
On Sun, Oct 25, 2015 at 4:44 AM, Fabio nonvedolora <
fabio.sav...@nonvedolora.it> wrote:
> hi, I applied the same map on the globe.
> [image: globe-Europe-400]
>
> ciao Fabio
>
> PS on reques
Oops, a typo:
I meant to say that, at the North Pole, no sundial will tell time when the
solar declination is south. But, of course, at the South Pole, it's when
the solar declination is *north*, that there won't be sunshine and sundials
won't tell time.
Michael Ossipoff
On Mon, Nov 16, 2015
tell time then.
Michael Ossipoff
26N, 80W
On Sun, Nov 15, 2015 at 5:37 PM, Phil Dorman <p...@wattagan.com> wrote:
> Hi Everyone,
>
>
>
> I joined this list because I have a specific question which I can’t find a
> definitive answer to.
>
>
>
> I want to ins
f due east.
So: Say the edge of a distant telephone-pole is due-east from you. Starting
out toward it, you're starting out traveling due eastward. But, after
you've proceeded even a little way, continuing in that same straight line
toward the telephone-pole edge, you'll soon be traveling i
quot;great circle".
So, the paradox was just the result of two different meanings of "travel
due-east".
Michael Ossipoff
On Tue, Sep 15, 2015 at 10:10 AM, Brent <bren...@verizon.net> wrote:
> I'm confused maybe.
>
> I live in the northern hemishpere and anticipating
on the hour-band. So I don't suppose that an
armillary with an equatorial band would lose more than a few days of
time-telling each year.
Besides, maybe the upper part of the equatorial band is narrower than the
lower part, as is sometimes the case.
Michael Ossipoff
> Speaking about sundials
, and that many sundials are marked in true solar time at the
central meridian.
Michael Ossipoff
On Fri, Oct 2, 2015 at 6:12 AM, Willy Leenders <willy.leend...@telenet.be>
wrote:
> Dan,
>
> What I mean is this:
>
> 1.
> Together with the sundial on the roof is given the EOT t
longitude west
or east of the place's central meridian.
Michael Ossipoff
26N, 80W
On Sun, Oct 4, 2015 at 7:13 AM, Michael Ossipoff <email9648...@gmail.com>
wrote:
>
>
> On Thu, Oct 1, 2015 at 3:55 PM, Willy Leenders <willy.leend...@telenet.be>
> wrote:
>
>
>>
The photographer must chosen in advance to take such a picture, and chosen
the right time for the picture.
Michael Ossipoff
On Tue, Dec 1, 2015 at 9:11 AM, Dave Bell <db...@thebells.net> wrote:
> Yes, the surprise is not so much that it happened, but that the
> photographer was ther
as the whole cube is.
Michael Ossipoff
On Tue, Jan 5, 2016 at 11:46 PM, Roger Bailey <rtbai...@telus.net> wrote:
> Thanks Fabio and Riccardo,
>
> This is really cool. It makes the design so easy, that it almost feels
> like cheating. Consider the classic painting by Holbein
going to define 4 seasons, then March is part
of Southern Hemisphere summer. December through March.
But it would make even more sense to speak of March and September as
1-month seasons, as described above.
Michael Ossipoff
---
https://lists.un
on 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
> <https://over
I mean, just using Excel, without using VBA.
Michael Ossipoff
On Sun, Jan 22, 2017 at 11:45 AM, Michael Ossipoff <email9648...@gmail.com>
wrote:
> 1. I don't understand how a spreadsheet's rectangularly-arranged table of
> values is a problem for designing circular things. The value
:
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
year-rule allows the luxury of making our own
choice of those two adjustment-parameters.
This posting is already very long, and so I'll save the
Minimum-Displacement leapyear-rule for a (immediately subsequent) next
posting.
Michael Ossipoff
I seems to me that the March Equinox tropical year
but it isn't necessary to base a calendar on a day that isn't today's
mean solar day.
Michael Ossipoff
> Dennis and Ken, if you're listening to this discussion, please chime in.
>
>
> On 1/29/2017 12:27 PM, sundial-requ...@uni-koeln.de wrote:
>
>> Send sundial mailing lis
above. .
..and of course, any time when the current year is a leapyear, that fact
will be amply announced long before the end of that year.
Michael Ossipoff
approx. 26N, 80W
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
nciest leapyear system.
I also propose a fancier, deluxely-adjustable system, but I won't try your
patience with that here, because Nearest-Monday is entirely good enough,
and is the system with obviously by far the best acceptance-potential.
Michael Ossipoff.
On Sat, Jan 28, 2017 at 3:38 PM, D
for the latitude-marks on the inside of the
vertical, piece--other than to make it look adjustable for latitude.
Michael Ossipoff
On Mon, Feb 20, 2017 at 9:57 AM, Dan-George Uza <cerculdest...@gmail.com>
wrote:
> Hello!
>
> There's a diptych sundial on sale for about 80 euros su
onto the lamp-post.
I'd consider declining-dials on the four faces, to that the shadow-casting
edge would intersect the dial-face, on all four faces.
Were pillar-dials usually, often, or ever made that way?
Michael Ossipoff
>
>
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
it allowed me to
conveniently use a carbon-paper template that I'd prepared for drawing the
hour-lines.
Maybe the plain cardboard dial-face would have easier construction in one
way, and less easy construction in another way. Maybe I tried one
all-cardboard dial. It was a long time ago.
Michael Ossip
What am I saying??
You don't need the formula for the sun's brightness at different altitudes.
You just need to tip the color-sample card, from the horizontal, toward the
sun by an amount that's equal to the amount by which the summer-solstice
deciination (23.44 degrees?) will be greater than
that is bright enough when the sun is at its
visible lowest at the dial-location, and still isn't too bright at solstice
noon (on a horizontal dial).
I'd bet that some brown or tan would be likely to meet both requirements.
Michael Ossipoff
On Tue, Feb 28, 2017 at 5:09 PM, Steve Lelievre
it
will be on the horizontal dial at summer solstice noon.
(unless I've made another error)
Michael Ossipoff
On Wed, Mar 1, 2017 at 10:27 PM, Michael Ossipoff <email9648...@gmail.com>
wrote:
> What am I saying??
>
> You don't need the formula for the sun's brightness at different alt
ound.
Equatorial disk sundials supported by the disk and by the end of the gnomon
on the ground are still in use.
Michael Ossipoff
On Thu, Nov 24, 2016 at 4:15 AM, Darek Oczki <dhar...@o2.pl> wrote:
> Dear all
>
> I would like to ask your opinion on the first sundials which
dn't it be good
for people to be able to request that the square containing their
front-door have the name of their house, if that word-combination (or
something too close to it) isn't already in use?
Thanks again.
Michael Ossipoff
On Mon, Dec 26, 2016 at 3:15 PM, Ian Maddocks <ia
tude & longitude?
...or, if preferred, some widely-used plane-coordinate system?
Michael Ossipoff
On Sun, Oct 16, 2016 at 1:35 PM, Ian Maddocks <ian_maddo...@hotmail.com>
wrote:
> Hi Doug
>
> If you haven't been concentrating I added the W3W address to my signature
> a few mo
on the horizon, if the horizon is visible.
A small paper tab, sliding on one of the edges, and casting an edge-shadow
on a date-scale, gives a declination-reading that can be used to
azimuth-orient the dial.
Michael Ossipoff
On Sun, May 14, 2017 at 5:18 PM, Fred Sawyer <fwsaw...@gmail.
-motivated two-measurement method
that I described above.
Michael Ossipoff
On Sat, May 13, 2017 at 9:23 PM, Michael Ossipoff <email9648...@gmail.com>
wrote:
> When I said that the vertical hour-lines should be drawn at distance, to
> the left, from the middle vertical line, that is
Hi Peter--
Thanks for the reply and info. Yes, I hope that Fred Sawyer will post about
the derivation of the construction of the Capuchin and Universal Capuchin
dials.
Fred, would you paste some of your lecture material, about that, into a
list e-mail here?
Michael Ossipoff
On Wed, May 10
a difficult explanation can give
me a good hint, regarding the nature of where the construction came from.
So thanks again for the help, the information, the links!
Michael Ossipoff
On Wed, May 10, 2017 at 4:56 PM, Yvon Massé <ymas...@wanadoo.fr> wrote:
> Michael,
>
> Some years ago
Sure, analytic geometry verifies that the Universal Capuchin dial agrees
with the formula that relates time, altitude, declination and latitude.
But that isn't how medieval astronomers &/or dialists arrived at the
construction of the Capuchin dials.
Michael Ossipoff
On Tue, May 9, 2017 at
nstruction of a Capuchin or
Universal Capuchin dial?
Can anyone here explain that? If so, the explanation would be appreciated.
Michael Ossipoff
[image: Inline image 1]
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
the article to which I was referring. So my question
is, "What would be a genuine explanation and justification for the
construction of the Capuchin and Universal Capuchin dials?
Michael Ossipoff
2017-05-09 15:49 GMT-04:00 Putowsky via sundial <sundial@uni-koeln.de>:
> Diese Nachricht wurd
.
Michael Ossipoff
On Mon, May 15, 2017 at 11:32 AM, Michael Ossipoff <email9648...@gmail.com>
wrote:
> Thanks for the Regiomontanus slide.
>
> Then the original designer of that dial must have just checked out the
> result of that way of setting the bead, by doing the calculation
ver the
Shepard's dial, or the related Roman Flat altitude dial.)
Michael Ossipoff
On Sat, May 13, 2017 at 3:47 PM, Fred Sawyer <fwsaw...@gmail.com> wrote:
> Take a look at A.W. Fuller's article Universal Rectilinear Dials in the
> 1957 Mathematical Gazette. He says:
>
> &qu
horizontal line, from the right edge to
the point where the vertical line is drawn, is one unit.
Michael Ossipoff
On Sat, May 13, 2017 at 7:03 PM, Michael Ossipoff <email9648...@gmail.com>
wrote:
> Fred--
>
> Thanks for your answer. I'll look for Fuller's article.
>
> One or twice,
arrived at.
So thanks for pointing out that natural approach, making choices than make
more sense than the approach I was considering.
Michael Ossipoff
On Mon, May 15, 2017 at 2:54 PM, Geoff Thurston <thurs...@hornbeams.com>
wrote:
> Michael,
>
> I seem to recall that sec
Of course, because only the four squared-terms are present, the two
binomials have to be chosen so that, when they're both squared, their
resulting middle terms cancel eachother out. (tan lat tan dec + 1) and (tan
lat - tan dec) meet that requirement.
Michael Ossipoff
On Mon, May 15, 2017 at 9
from being accurate.
Michael Ossipoff
On Sun, May 14, 2017 at 5:18 PM, Fred Sawyer <fwsaw...@gmail.com> wrote:
> Michael,
>
> See the attached slide from my talk. All the various dials work with a
> string of this length. They vary simply in where the suspension point is
&
ph of something where do you put the
> markers to make the measurement?
>
Along two mutually-perpendicular edges, measured from a common corner? :^)
Michael Ossipoff
> Brooke
> Clarkehttp://www.PRC68.comhttp://www.end2partygovernment.com/2012Issues.html
>
> Origin
ous suspension points were part of my
> presentation.
>
What were some of the alternatives, and some of their relative advantages?
Michael Ossipoff
>
>
> Fred Sawyer
>
>
> On Sun, May 14, 2017 at 4:40 PM, Michael Ossipoff <email9648...@gmail.com>
> wrote:
>
ve dials on its
4 vertical sides.
Michael Ossipoff
On Thu, May 25, 2017 at 1:30 PM, Dan-George Uza <cerculdest...@gmail.com>
wrote:
> Hello!
>
> I'm looking for advice on how to cast a sundial from epoxy resins,
> specifically a cubical multiple sundial. Any ideas on how to go
dial-face.
Michael Ossipoff
On Tue, Jun 6, 2017 at 7:59 PM, Michael Ossipoff <email9648...@gmail.com>
wrote:
> Hi Dan--
>
> I don't claim to have an answer to your question, because (evidently like
> most) I don't know anything about casting resin.
>
> At least one 5-fac
r bowl will have a cool ancient look when it weathers.
Michael Ossipoff
>
> *From:* Michael Ossipoff [mailto:email9648...@gmail.com]
> *Sent:* Tuesday, October 17, 2017 8:44 PM
> *To:* Brad Thayer <wissenschaft...@verizon.net>
> *Cc:* sundial list <sundial@uni-koeln.de>
when adjusted for Equation-of-Time and for your longitude).
I'd suggest changing your project to a garden-style Horizontal-Dial.
Michael Ossipoff
>
>
>
---
https://lists.uni-koeln.de/mailman/listinfo/sundial
way that a Disk-Equatorial does. ...but their
dial-surface is parallel to the Earth's polar-axis so someone could argue
that they should be called Polar Band or Cylinder dials.
So what are they correctly called?
Michael Ossipoff
..
On Wed, Oct 18, 2017 at 3:29 AM, Nathaniel Shippen <shippenn..
in the winter.
Michael Ossipoff
On Mon, Oct 16, 2017 at 8:48 AM, Brad Thayer <wissenschaft...@verizon.net>
wrote:
> I am looking to make a hemicyclium-type sundial (half-hemisphere) in a
> metal working class. What little I can find on them says they are
> inaccurate, without b
, the drinking-cup would
need a way of hanging it in the right orientation, and so it wouldn't be
much like an ordinary drinking-cup. ...and the line-marking would be
complicated by the non-cylindrical shape of the cup.
Michael Ossipoff
On Mon, Oct 16, 2017 at 8:48 AM, Brad Thayer <wissensch
better of ancient
realism.
Besides, with the spike horizontal, its tip-nodus will still have a shadow
that the spike itself doesn't get in the way of at equinox noon.
Michael Ossipoff
f
.
On Thu, Oct 19, 2017 at 11:13 AM, Frank King <f...@cl.cam.ac.uk> wrote:
> Dear Brad,
>
>
Of course, for the Cylinder Equatorial with circumference aperature, you
could have declination-ilnes, which would be circles around the cylinder's
circumference.
Michael Ossipoff
On Wed, Oct 18, 2017 at 10:23 PM, Brad Thayer <wissenschaft...@verizon.net>
wrote:
> Michael,
>
>
someone's child is taking such courses.
Michael Ossipoff
On Sun, Nov 5, 2017 at 10:46 AM, Dan-George Uza <cerculdest...@gmail.com>
wrote:
> Hello,
>
> I am looking for titles of sundial books for children. I particularly
> liked Annos sundial pop-up book by Mitsumasa Anno.
Equatorial if it directly measures the Sun's
apparent movement parallel to the equator, on a uniform circular scale that
measures along a line parallel to the equator. ...even if the dial-face
isn't parallel to the equator.
Michael Ossipoff
the
a.m. hours, or the number of hours from 6 p.m., during the p.m. hours."
...which could also be said as: " 15 degrees times (6 minus the number of
hours from 12 noon)".
...for the hours from 6 a.m. to 6 p.m.
Michael Ossipoff
On Mon, Oct 23, 2017 at 7:31 PM, Michael Ossipoff
on the window-sill, of course the
cylinder's inclination above the horizontal is easily adjusted by sliding
the cylinder (or cone) northward or southward ...to incline the cylinder
or cone with its axis parallel to the Earth's axis.
Michael Ossipoff
On Tue, Oct 24, 2017 at 4:33 AM, <wsga
Typo:
When I said:
"So, in north declination, the south-notch would be used."
...I meant "*north*-notch".
Michael Ossipoff
On Tue, Oct 24, 2017 at 4:33 AM, <wsgalin...@gmail.com> wrote:
> Thank you for your nice considerations.
>
> I think that some ki
Another typo:
When I said:
"And in north declination, the circumference-aperture would be used."
I mean that in *south* declination the circumference-aperature would be
used.
Michael Ossipoff
On Tue, Oct 24, 2017 at 4:33 AM, <wsgalin...@gmail.com> wrote:
> Than
equal to the local latitude. ...and read the time from the
hour-lines marked inside the cup.
Obviously the circumference-aperature would limit how high you could fill
the cup, when using it for drinking.
Michael Ossipoff
On Thu, Oct 19, 2017 at 2:31 PM, Michael Ossipoff <email9648...@gmail.
That's true--A sundial shows things that a clock doesn't show, a direct
showing of nature's day and year.
Michael Ossipoff
On Mon, Jan 15, 2018 at 2:55 AM, Kurt Niel <kepler...@gmail.com> wrote:
> In some practical matter:
> Using sundials you can:
> - directly observe beha
of whether there's practical need.
Michael Ossipoff
On Sun, Jan 14, 2018 at 2:26 PM, Willy Leenders <willy.leend...@telenet.be>
wrote:
>
> When I talk about sundials, I get the question: "What utility can sundials
> have today?"
> In order to be able to give an answer as
breeze is
rustling the chlorophyll leaves of the green trees. So, with the warm
sunshine warming your face, you say, “Ah yes, let’s intrusively experiment
on the Sun, and dump garbage into it!”
.
Michael Ossipoff
---
https://lists.uni-koeln.de
to me that the probe is much
smaller than the Sun :D
.
II mentioned the matter here because people here probably aren't
unanimously gung-ho about "anything for science".
Michael Ossipoff
On Fri, Feb 9, 2018 at 12:26 AM, Roger Bailey <rtbai...@telus.net> wrote:
> Hel
of
getting hit by a car. In the morning dark, there are a lot fewer dangerous
people out, as compared to evening dark.
I suggest that every consideration points to leaving clocks on
advanced-time all year.
Michael Ossipoff
On Fri, Dec 22, 2017 at 3:36 PM, Dan-George Uza <cerculdest...@gmail.
John--
But isn't it saids that Babylonian and Italian hour-lines are straight
lines?
Michael Ossipoff
2018-08-10 4:50 GMT-04:00 John Davis via sundial :
> Diese Nachricht wurde eingewickelt um DMARC-kompatibel zu sein. Die
> eigentliche Nachricht steht dadurch in einem Anhang.
>
>
Sara and John--
But it's said that the hour-lines for Babylonian, Italian, and co-Italian
hours are straight lines, as they are on all the other dials that I've seen
that have Babylonian &/or Italian hours.
Michael Ossipoff
On Fri, Aug 10, 2018 at 4:37 PM, Schechner, Sara
wrote:
&g
1 - 100 of 240 matches
Mail list logo