John, A chapter of the FAQs should be devoted to the different kinds of hours used by people in the past and sometimes shown by sundials.. Is it possible to list all of them ? Why were there so many different kinds ? Where were they used ? Where do they come from ? When did they appear in the history and when did they vanish ? What "hours" were used in India, Japan, Korea, China,... ? Was there a hour system in the Maya and other central american civilizations ? And so on. It would not be an uninteresting chapter
Best regards Jean-Paul Cornec
