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
    1906 Bowditch
    From: Dan Allen
    Date: 2004 Apr 6, 13:31 -0700

    According to Campbell, "Bowditch continued to be published without any major
    revisions until 1887, when it again underwent revision.  Although each
    succeeding printing resulted in minor changes, Bowditch did not have its next
    major revision until 1907.  This revision almost saw the lunar distance
    problem eliminated from the work, but it was decided, in view of its archaic
    principles, to relegate it to the appendix."  Continuing Campbell wrote, "In
    1914... the chapter on lunar observations was finally excluded."
    Well, I have evidence that Campbell is incorrect.  I recently obtained a 1906
    Bowditch.  In this edition, published in Washington DC by the Government
    Printing Office, there is an Appendix V which is 44 pages in length.  It
    contains several pages describing lunars, followed by several tables used in
    solving lunar distance problems.  The description states that the method is
    that of Chauvenet, with the tables showing first and second corrections, and
    several tables to deal with the semidiameter of the sun and moon.
    This edition which I have in my possession states that it is a reprint of the
    1903 edition with no changes to the text or tables except to correct errors.
    What this all means is that lunars did not get moved to an appendix in the
    1907 edition, as many have believed.  Lunars were moved to an appendix in at
    least 1903, and possibly earlier.  My 1888 edition of Bowditch still has lunar
    distances integral with the text, so sometime between 1988 and 1903 the change
    was made.  This moves their use slightly further back in time than I had
    That's my lunar research for the day,
    Dan Allen

    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