Reinhold Ebertin's first edition of this book was revised and updated in 1974 and contains a treasure of information on comparative charts for marriage. This detailed textbook presents numerous examples of the relationship between the cosmos, man and marital compatibility. Keys are given on how to recognize whether a cosmic marriage will develop harmoniously or not. Rules of comparative analysis and significant aspects include the Ascendant, Midheaven and Moon's Node. Most of the examples are given using the traditional delineation of chart connections, however midpoints and the use of Ebertin's 90 degree wheel in Cosmobiology are given as well.