David Lamb
Well-Known Member
- May 30, 2024
- 3,922
- 2,140
- 76
- Country
- United Kingdom
- Gender
- Male
- Faith
- Baptist
- Marital Status
- Married
Prodromos has already written: "From the same wikipedia article you quoted from:What makes you think that sundials have been adjusted ?
Since the Greek dials were nodus-based with straight hour-lines, they indicated unequal hours that varied with the seasons, since every day was divided into twelve equal segments; hours were shorter in winter and longer in summer. Sundials with gnomons oriented towards the celestial pole are able to exploit the fact that the markings for the equinoctial hours are a family of straight-line segments, thereby allowing for the measure of equal hours." Then in another post:
"If they didn't adjust, it meant that the hours during Winter could be as short as 40 minutes and the hours during Summer could be as long as 80 minutes for the same shadow movement".
Upvote
0
