Re: Another Kipling Heliograph Poem

Thank you, Prof. Langley, for illuminating yet another marvelous facet of this List. Kipling, the author of the ritual for the calling of a Canadian engineer, was a clever dude, eh? Tom

Signalling mirrors

Dialling friends, Like many of you, I have seen the signalling mirros with holes in the centre etc. I have never used one, but I have a mirror successfully to call in helicopters. During field work in Antarctica, we didn't have radios, so we made up some signalling mirrors. Just a rectangular

Another Kipling Heliograph Poem

(This one's not so vernacular.) A Code of Morals by Rudyard Kipling Lest you should think this story true I merely mention I Evolved it lately. 'Tis a most Unmitigated misstatement. Now Jones had left his new-wed bride to keep his house in order, And hied awa

Re: heliograph

On Wed, 23 Jun 1999, Frank Evans wrote: >Maybe somebody can remember more of Kipling's poem referred to earlier >than I can. Or even the title. It was about India, I'm fairly sure. >Part went something like: > >Are you there, are you there, are you there? >Three sides of a ninety mile square, >

Old idea?

John B. wrote in part: >There is a sundial which is a disk with a rod for a gnomon running >perpendicularly through its center. I understand the problem is that >it can only be read from the top in the summer and the bottom in the >winter. Has anyone tried making the dial of acrylic/perspex/gl

Old idea?

I just had an idea, and as a newbie, I thought I'd bother you with it. There is a sundial which is a disk with a rod for a gnomon running perpendicularly through its center. I understand the problem is that it can only be read from the top in the summer and the bottom in the winter. Has anyone

Re: Heliograph

Bob Haselby <[EMAIL PROTECTED]> wrote: > Jim, I found one of these signal mirrors in the surf years ago. [description elided] > You will also see the light "ball" at that spot . Then move > your head and the mirror together until the spot lines up with the > distant object. As I recall

Re: Heliograph

Jim_Cobb wrote: > Bob Haselby <[EMAIL PROTECTED]> wrote: > > Tony, This sounds like a "signal mirror" which were also contained > > in life jackets etc as survival gear. The more modern are quite > > effective and are great for annoying people on the beach. It uses > > double internal reflection

Re: A couple of items on the web concerning the sun

I found a CNN item on the French sundial. It has more historical information than the Fox News version. http://www.cnn.com/TRAVEL/NEWS/9906/22/france.sundial.ap/ Jim --- -- | Jim Cobb | 540 Arapeen Dr. #100 | [EMAIL PROTECTED]

RE: Heliograph

Bob Haselby and Tony Moss dialoged: > >This sounds like a "signal mirror" ... It uses double internal > >reflection in the hole to give a virtual image of the sun > > Any chance of a diagram or somesuch to show how this works Bob? It could work like this: Set up two sheets of glass and a mirror

Re: signal mirrors with attachment

Tony Moss wrote: > Bob Haselby contributed > > >This sounds like a "signal mirror" which were also contained in life > >jackets etc as survival gear. The more modern are quite effective > >and are great for annoying people on the beach. It uses double internal > >reflection in the hole to give a

Re: Heliograph

Bob Haselby <[EMAIL PROTECTED]> wrote: > Tony, This sounds like a "signal mirror" which were also contained > in life jackets etc as survival gear. The more modern are quite > effective and are great for annoying people on the beach. It uses > double internal reflection in the hole to give a virtu

Re: signal mirrors

Tony Moss wrote: > Bob Haselby contributed > > >This sounds like a "signal mirror" which were also contained in life > >jackets etc as survival gear. The more modern are quite effective > >and are great for annoying people on the beach. It uses double internal > >reflection in the hole to give a

Re: heliograph

Frank, It may be a surveying party for the triangulation of India: a square of four corners, with three sides being sufficient for signaling between the four stations. At those distances I suspect that only the heliograph could be observed with a theodolite during the daytime. Gordon At 12:47

Re: Heliograph

Bob Haselby contributed >This sounds like a "signal mirror" which were also contained in life >jackets etc as survival gear. The more modern are quite effective >and are great for annoying people on the beach. It uses double internal >reflection in the hole to give a virtual image of the sun

Re: Heliograph

Tony Moss wrote: > Peter Mayer contributed > > > > My recollection is that they were > >used by military forces in the 19th century in places like India. (I have > >a half-baked recollection that Kipling refers to one in a poem...¿Is that a > >source?!) > > > In my impecunious searches of WWII

heliograph

Maybe somebody can remember more of Kipling's poem referred to earlier than I can. Or even the title. It was about India, I'm fairly sure. Part went something like: Are you there, are you there, are you there? Three sides of a ninety mile square, With a helio winking like fun in the sun, Are yo

Re: A couple of items on the web concerning the sun

Hello There is a description of the first project using the obelisk as a gnomon, in the book "cadrans solaires de Paris" by Andree Gotteland and Georges Camus. The idea was from the famous Camille Flamarion in 1913 and some lines have been installed in 1939, immediately stopped by the war. Only

Re: Heliograph

And, as a geodesist, it would be remiss of me not to point out that the heliograph was preceded by the heliotrope, a device to make survey stations more visible from long distances, invented by the father of modern geodesy, Carl Friedrich Gauss, in the early 1800s. -- Richard Langley Professor

Re: Heliograph; heliotrope.

Tony Moss described: >..snip... a "Portable Heliograph Set' in a pouch. It was >simply a mirror about four inches across with a sighting >hole in the middle. A length of cord attached it to a short >rod with a bead on top. ... snip ... It all seems rather 'iffy' >but I suppose was intended

RE: Heliograph

Tony Moss wrote: > In my impecunious searches of WWII 'surplus' stores back in the > 1950s I came across a "Portable Heliograph Set' in a pouch. It > was simply a mirror about four inches across with a sighting hole > in the middle. A length of cord attached it to a short rod with > a bead on

Re: Heliograph

On Wed, 23 Jun 1999, Tony Moss wrote: > In my impecunious searches of WWII 'surplus' stores back in the 1950s I came > across a "Portable Heliograph Set' in a pouch. It was simply a mirror about > four inches across with a sighting hole in the middle. A length of cord > attached it to a shor

Re: Heliograph

Tony Moss <[EMAIL PROTECTED]> > In my impecunious searches of WWII 'surplus' stores back in the > 1950s I came across a "Portable Heliograph Set' in a pouch. It was > simply a mirror about f our inches across with a sighting hole in > the middle. A length of cord attache d it to a short rod wit

Re: Heliograph

Peter Mayer wrote: > > I'm attaching a tiny JPEG illustration, taken from an ancient > dictionary, which accompanies the definition of 'heliograph'. The > instrument definitely has a mirror! But as you'll see, it also incorporates > a telegraph key and a sighting vane. My recollection i

Re: A couple of items on the web concerning the sun

-Message d'origine- De : Richard Langley <[EMAIL PROTECTED]> À : Jim_Cobb <[EMAIL PROTECTED]> Cc : sundial@rrz.uni-koeln.de Date : mercredi 23 juin 1999 05:55 Objet : Re: A couple of items on the web concerning the sun >On Tue, 22 Jun 1999, Jim_Cobb wrote: > >>http://www.foxnews.com/js_

sundial.org logon problem

Hi Robert: Just tried logging onto and the title page came up which said "welcome to www. sundial .org" in red letters with a link to Highway Productions at the bottom. My screen says document done and no advancement is possible. Where's the rest of the website and what

Re: Heliograph

Peter Mayer contributed > > My recollection is that they were >used by military forces in the 19th century in places like India. (I have >a half-baked recollection that Kipling refers to one in a poem...¿Is that a >source?!) > In my impecunious searches of WWII 'surplus' stores back in the 1950s

Re: Heliograph

Dear Friends, The heliograph was indeed used for some time in military and other settings. I have a most intriguing book about it and its construction, use, and capabilities. It is remarkably simple, can be set up (there being, of course sunshine -- so not so helpful here in western

Heliograph

Fernando Cabral wrote: >As far as I know, what you call "heliograph" we just call >"mirror". Nevertheless, there can be other names and usages >if you check with the different armed forces and other people >with survival training. > >As to me, the only name I know is really "mirror", even for >th