How to Calculate the Magical Hours Part 3

This last part which is the actual calculations is what is needed to do the magical ceremony or operation. I have given correspondence, a tad bit of history and very basic knowledge of the calculations and the reasoning behind it. This system as set down is from Heinrich Cornelius Agrippa, in his book/s, 3 books of occult Philosophy.
Each hour of the day is govern by a wondering Nomad which the Greeks called planets, or wondering star.  Each of these Wondering stars or planets has certain energy that the magician will be able to tap into or use to aid or influence the magician. Or be able to aid in such work as Summoning spirits that has associations to planetary energy.
So before the operation the wizard will need to do the following calculation to determined the magical/planetary time. To start with Each hour is to take the total time from Sunrise to Sunset and is divide by 12 which is to account for the 12 houses in astrology. So you will get some "hours" that are 45 minutes or even 75 minutes some are more or less. This is in due for summer and winter months.
This can also be used for Night magical hours to.

To calculate you may need to go to a almanac, or look on the internet like http://aa.usno.navy.mil/data/docs/RS_OneDay.php or http://www.stargazing.net/mas/usno1.htm just give a couple. You get the Idea. You may also see if you local newspaper or even astronomical book in your local library. Then you figure out the hour and minute difference between the two times, and convert that to minutes.  Then convert the hours of sunlight into minutes, by multiplying the hours by 60 and adding the remaining minutes, then divide by 12. Round accordingly. The sunrise time is the start of the first hour. To find the second hour, and each hour after that, add the planetary hour length to the previous hour time. Repeat this process until you reach sunset. Then to calculate for the night you repeat this process from previous correspondence of of the hours or day and time of part two of these article. Then look at the night portion of the charts below, and calculating from sunset of the current day to sunrise of the next day. While I would like for you to think and learn like they did back then you will be able to cheat and use the following software. http://chronosxp.sourceforge.net/en/
Thats It, hay magic can be some work and the medieval and renaissance magic saw there work as science so it should be treated as such. But thar is for another time.