Hi Jim et al,
Sutton's quadrant was described at some length in a two-part article:
M. Lowne & J.
Davis: ‘A Horizontal Quadrant of 1658 by Henry Sutton; Part 1’, BSS Bull.,
23(ii) 8-13 (Jun
2011).
with the second part in the following issue.
Regards,
John
-------------------------------
Dr J Davis
Flowton Dials http://www.flowton-dials.co.uk/
BSS Editor http://www.sundialsoc.org.uk/bulletin.php
________________________________
From: James E. Morrison <janus.astrol...@verizon.net>
To: sundial@uni-koeln.de
Sent: Tuesday, 13 May 2014, 2:40
Subject: Re: Altitude dials as compasses
This discussion has not included noting the capabilities of quadrants. There
are several stereographic quadrants that provide the solar azimuth for a date
and solar altitude. Among them are Gunter's quadrant (if azimuth curves are
include), the Islamic quadrant based on a folded astrolabe and Sutton's
quadrant which uses a southern projection. Of the several, Sutton's quadrant
is the easiest to use and the most precise for its size.
I am not aware of much in print about Sutton's quadrant other than the chapter
in "The Astrolabe". I can easily generate recreations if there is an
interest/need.
Best regards,
Jim
James E. Morrison
janus.astrol...@verizon.net
Astrolabe web site at http://astrolabes.org
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