The Solar Quadration
There are approximately 90 solar quadrations. The charts are numbered from 0 - 89 and represents your age for a given year. For the age of 90 and above, the solar quadration starts again with 0 and continues as each year passes. The Solar Quadration application below will accept any year after 89 and will automatically calculate the solar quadration for that age.
The chart below is read from right to left. The chart starts on the Mercury line (right-most column).
Both your life and yearly spreads starts with the card immediately to the left of your Solar Earth card.