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Posted by Chriscase [76.201.17.56] on Sunday, October 04, 2009 at 09:38:11 :
In Reply to: Primative but Effective posted by copey [206.80.245.5] on Sunday, October 04, 2009 at 05:03:41 :
Very in depth book.
Two volumes, first is 750 pages. Original copyright 1806? All the history, hows and whys of navigation.
The whole thing is on line.
http://www.irbs.com/bowditch/
After he reads it ;) you can explain how a s extant works.