SUNDEMO.ZIP is  a Demo of group of programs (running in DOS ) to calculate
and draw several type of Sundials.
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DESCRIPTION
The programs (all in English) can calculate :
	Sundials (classical) on a whatever plane
	Sundials with ancient hours ( Italic, Babilonian, Temporary) on a
           whatever plane
        "Monofilar" Sundials in which the hour is marked by the point of
           intersection of the shadow of a straight line with  daily lines of
           particular forms ( circle, rectangle, ellipse, ecc.)
	Bifilar Sundials (Michnik) on a whatever plane
	Sundials on the inner and on the outer surface of a vertical cylinder ;
           also Shepherd s. , hat s. 
	Sundials on the inner and on the outer surfaces of an horizontal
           cylinder; also rings, ecc.
	Sundials on the inner and on the outer surfaces of a vertical cone 
	Time's Equation curves

The programs allow to calculate and tabulate on a printer the data in
rectangular or polar coordinates and to draw the sundials in several ways.
It's possible the zoom, to show the sundial in perspective, to show the
shadows of the rod and to move it varying time ( hour or day).
All the programs allow to calculate  without or with Time Equation ( hourly
lines are 8-shaped) . The number of hours and days along the year can be
choosen as you will.
The draw of the sundial can be printed in scale on a HP-inkjet/laser

In the SUNDEMO programs it's not possible to change Latitude and Longitude
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INSTALLATION
Put the ZIP  file in a directory, unzip it and run it by the command  SUNDEMO
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USE
In each program are registered same default values that can be used simply
typing ENTER and give the possibility to run programs immediately.
In all the program the ESC key allows to return to the previous page and F1
key gives an help on line
The file SUNDIAL.TXT  (in ASCII) contains other explanations .
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SUNDEMO is FREEWARE, is freely distributable without limitation

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To contact the author  write or send an E-Mail message to :
Ing. FERRARI GIANNI - Via Valdrighi 135 - 41100 Modena - ITALY
E-Mail   :   frank.f@pianeta.it
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