Peter Mayer wrote:
> Dear Shadow Watchers,
>
> On Friday the 18th, Fernando replied:
>
> >Thibaud Taudin-Chabot wrote:
> >Perhaps a device lost people
> >could use to send signals to airplanes saying indicating they
> >need help. This kind of usage would make sense to me.
> >
> I wonder if it is a translation for "heliograph', a device for
> sending Morse code by flashing the sun's rays from a mirror?
Precisely. Nevertheless, in Portuguese "heliógrafo" is a device
to *record* the insolation. Usually a crystal ball under which
a piece of paper is burnet indicating when the sun is shining....
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
those especially-made mirrors with a small hole in the centre
(to be used to collimate the light ray).
Again, since you can clearly use such a device to send
Morse code you can say you "write" with the sunlight,
than calling it "heliograph" should not be unacceptable.
- fernando
>
>
> cheers,
>
> Peter
>
> ----------------------------------------------------------------------
> Peter Mayer | [EMAIL PROTECTED]
> Politics Department |
> University of Adelaide | 'phone:+61.8 8303 5606/5610
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