ATDTDA (33) - p. 924-6 peyote

[Michael Bailey]

doesn't the heliograph also figure in M&D?

On 5/21/08, Monte Davis <monte.davis at verizon.net> wrote:
> Laura sez:
>
>  heliograph:  this is actually a device with mirrors used for long-distance
>
> Morse code communications...
>
>  Utter nitpickery, but as (like the semaphore) it long preceded the
>  telegraph, surely it used pre-Morse codes.
>
>