Of the thirty years devoted by the undersigned to research and the study of astrology and astro-diagnosis, a large part was spent with Max Heindel, first as co-student and companion and later as his wife. A portion of the astro-diagnosis in this book have been taken from Mr. Heindel's former monthly lessons to esoteric students, and this fact together with our association in astrological research in the reason why this volume goes out under both our names, even though he passed into the larger life in 1919.
This book may differ in a few instances from other books which deal with the science of diagnosis from the planets. The authors of this volume, however, have had opportunities such as few other writers on this subject have had. The Rosicrucian Fellowship, of which they were the founders, has a very successful healing department. A description of the method used in this department may be found on page 440. Of the thousands of patients who have written to us for healing since the department started, each one has sent in data describing the disease from which he suffered, its symptoms and peculiarities, the doctor's diagnosis, etc. This information was in every case carefully compared with the patient's horoscope, and a detailed study made of both. The most striking as well as typical cases were used as monthly lessons for the esoteric students of the Fellowship. From these lessons we have chosen the best to print in this book. At no time have we diagnosed direct to the patient. His horoscope, however, has given us a wonderful key to the disease from which he was suffering and its causes, and it has been used as a guide in giving advice regarding diet, exercise, environment, and similar matters.
We do not claim that this book is the last word on the subject, neither do we claim that it is infallible. The knowledge which we have gained by years of unceasing labor we are sharing with the world. We give it freely, and if others can add to it, we shall rejoice.
--Augusta Foss Heindel
Link to site for book and data: http://www.rosicrucian.com/adh/adheng01.htm?01.htm