When first introduced to the materia medica the student is bewildered by the mass of symptoms presented under each drug and he often seeks for a way out of the seeming maze. "Decachords" will provide the earnest student with some necessary clues guiding him to a practical acquaintance with more frequently used remedies. A number of additional remedies have been included at the end of the book. the indications taking the form of "Pentachords". These bring the total of drugs dealt with up to one hundred and twenty. The notes are gathered from various sources. Due acknowledgements are made to Sir John Weir and Dr Wheeler, whose valuable lectures have furnished much of the material. Well-known works by Doctors Allen Cowperthwaite, Nash and others have also been drawn upon for many keynotes.