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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Errors in Cotter's book, updated
From: Fred Hebard
Date: 2003 Jan 9, 14:51 -0500
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@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
