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
    or...
       
    Reply
    Re: Errors in Cotter's book, updated
    From: Fred Hebard
    Date: 2003 Jan 9, 14:51 -0500

    One quibble with George Huxtable.  He wrote:
    
    >The second-difference is the effect of curvature of the declination plot,
    >and would have its greatest effect near a solstice (not in May as Fred
    suggests).
    
    The reason I chose May was because at the solstice the rate of change
    in declination, the first difference, is close to zero, so it doesn't
    matter what the second difference is.  In May, there is still a
    significant first difference, but the second difference is also
    becoming large, to reach maximum at the solstice.  The second
    difference was zero at the equinox.
    
    
    --------------------------------------------------------------------------
    Frederick V. Hebard, PhD                      Email: mailto:Fred{at}acf.org
    Staff Pathologist, Meadowview Research Farms  Web: http://www.acf.org
    American Chestnut Foundation                  Phone: (276) 944-4631
    14005 Glenbrook Ave.                          Fax: (276) 944-0934
    Meadowview, VA 24361
    
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    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:

    Email Settings

    Posting 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