The old book by W. Schroeder , < Practical Astronomy > , is a good reference. It has many pages devoted to the astrolabe theory and shows a graphic way to make an astrolabe. If you are familiar with math you'll find quite easy to translate the graphic instructions in trig formulae in order to simplify the task.
Best regards Alberto Nicelli Italy (45,5 N ; 7,8 E) > ---------- > From: Tinkler[SMTP:[EMAIL PROTECTED] > Sent: giovedì 16 aprile 1998 17.22 > To: sundial@rrz.uni-koeln.de > Subject: Astrolabe > > By chance would anyone here happen to have any instructions on making an > Astrolabe? Or mayby a copy of some of the varous treatise on the subject > from > some old manuscripes. that could be scanned in? > > > David R. Carlson ([EMAIL PROTECTED]) >