Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: Solar storms. was: New inovation in astro navigation?
    From: Frank Reed
    Date: 2010 Aug 4, 19:33 -0700

    Here's a brief discussion of the induced currents:

    One thing to note here is that there are big currents in the ground and that may help explain what was going on in those old telegraph systems in 1859.

    For some real enjoyment, visit Google Books and search on "telegraph" in books published during the 19th century. There are hundreds of books. Many of them speak in awe of the technology. It's like reading about the rise of the Internet today. Here's just one example:
    "The Electric Telegraph has excited and is still exciting much interest over all the enlightened parts not only of this country, but of the world. No one can view the extensive lines, and hear of and see its wonderful, nay, magical effects, without a strong desire to become better informed of its history and mode of operation. Like every other branch of science, it has a history, a beginning, and a gradual advance to its present perfect state." (in 1853!)

    You can follow the competition between various different signalling systems (Bain vs. Morse, for example) and different coding systems. We're all used to Morse code as the standard for telegraphy into the 20th century, but it took some decades for it all to shake out.

    PS: Speaking of codes, many of you have been around computers long enough to know the expression "ASCII". Try this: go to google books and look up "ascii" in books published before 1900. You may be surprised to find it in books on astronomy and navigation. :)

    NavList message boards and member settings: www.fer3.com/NavList
    Members may optionally receive posts by email.
    To cancel email delivery, send a message to NoMail[at]fer3.com

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site