Applet "Quadrans Vetus"
The Quadrans Vetus is a portable sundial for all latitudes, indicating the unequal (planetary) hours.
1380 – 1442
1423 - 1461
(Regiomontanus)
1436 - 1467
Applet "Quadratum Horarium Generale"
This instrument is a portable sundial for all latitudes.
Applet "Capuchin Dial"
This instrument is a portable sundial for a single latitude.
(Petrus Apianus)
1495 - 1552
Applet "Apian Card Dial"
This instrument is a portable sundial for all latitudes.
Applet "Apian Card Dial"
This instrument is a portable sundial for a single latitude.
1581 - 1626
Applet
"Gunter's Quadrant"
The Gunter Quadrant was used to tell the time of day and to simplify astronomical calculations for the Sun (altitude, azimuth, declination, right ascension, position of the Sun in the zodiac).
The Gunter Quadrant was used to tell the time of day and to simplify astronomical calculations for the Sun (altitude, azimuth, declination, right ascension, position of the Sun in the zodiac).
Applet "Quadrant Dial"
This quadrant is a simple dial for a single latitude.
Applet "Planet Clock"
This applet is computing the planetary (unequal) hours, and many more data by modern astronomical algorithms.