Some general directions as it regards the importance of various symptoms, the varieties of constitution and temperament, the detection of the peculiar nature of disease, may appropriately be introduced in this place. In prescribing homceopathically, it is of high importance that the nature and cause of the disease should be understood. In loosing sight of the great landmarks, in seizing hold of an isolated symptom and prescribing carelessly or at random very little good is effected, and sometimes, much positive harm done. Let us make plain then a few prominent points, the correct knowledge of which may enable the patient to understand more readily the character and progress of the disease and the presence of danger.