The Decanate Chart by Helmut Licht (2010)
This book explains the concept of the Decanate Chart. A decanate is one of the three 10 degree section that make up an astrological sign. Each decanate corresponds to, has an affinity with and projects to its corresponding 30 degree sign. E.g. The sign Aries is made up of three decanates corresponding to Aries, Leo and Sagittarius, the three sign of the fire triplicity. E.g. the second decanate of Aries (its Leo decanate) corresponds to the entire sign of Leo. The Decanate Chart system is based on the assumption that, if a 10 degree section of a sign corresponds to an entire 30 degree sign, then any point within that 10 degree section has a corresponding position three times its value in the respective entire sign.
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