Welcome to the NavList Message Boards.

NavList:

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

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    Re: Cross Staff in use, 1574 image
    From: Wolfgang K�berer
    Date: 2009 Oct 16, 23:11 +0200

    Brad,
    
    If you look at it closely you can see that the upper celestial body is not
    the sun but the moon. The picture illustrates a lunar distance as one can
    also find out from the text which the picture accompanies. And the picture
    above that illustrates horizontal parallax.
    
    As must have been mentioned numerous times before on the list, the method of
    lunar distances was first described by Johann Werner in 1514 in a new
    translation and commentary on the first book of Ptolemy's geography. All
    this is recounted in detail - and with the original text - in Andrewes,
    William, The quest for longitude, Cambridge, Mass. 1996, 376 - 385.
    
    Regards,
    Wolfgang
    
    
    
    --~--~---------~--~----~------------~-------~--~----~
    NavList message boards: www.fer3.com/arc
    Or post by email to: NavList@fer3.com
    To , email NavList+@fer3.com
    -~----------~----~----~----~------~----~------~--~---
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

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

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

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

    Email Settings

    NavList ID Code:

    Custom Index

    Subject:
    Author:
    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