NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: The backstaff. was: Re: The Shovell disaster
From: Nicol�s de Hilster
Date: 2007 Nov 08, 08:28 +0100
From: Nicol�s de Hilster
Date: 2007 Nov 08, 08:28 +0100
> Interesting. I only knew of the method of Philippe de La Hire described > in Maurice Daumas' "Scientific Instruments of the 17th and 18th > Centuries and their Makers". (It's a good book on general instruments, > including navigation - I found an English translation of the original > French book in a second-hand bookstore for $45 years ago - a bargain > considering the content and how often I refer to it.) > > La Hire uses a system based on circular arcs. > I'd be very interested in this. Found the book on Amazon for just under GBP25,- and ordered it straight away. Thank you for bringing this book to my attention. --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---