Concurrent with the mixture, a blister or strong warming plaster should be laid over the left breast, according to the severity of the pain, and the spine between the shoulders rubbed with warm turpentine, or an embrocation composed of equal parts of camphorated oil, turpentine, and oil of amber. Having by these means, and strict repose, subdued the paroxysms, means must be adopted to prevent, if possible, a recurrence of the disease. This may be effected by removing all the exciting causes; by diminishing plethora, through aperients and low diet, by a diminution of animal and a preponderance of vegetable food; by avoiding all stimulants, spices, and heating substances, and by guarding against all violent emotions of the mind, or sudden and undue exertion or exercise. As all the symptoms of angina pectoris may be caused by dyspepsia, the state of the stomach should always command the first and most important consideration. The next and last of the functional diseases of this organ is _neuralgia of the heart_, which differs chiefly from angina pectoris in being characterised by sharp darting pains in the left breast, but unattended by any obstruction in the respiration, and in most cases without any change in the heart’s action or the pulse. It is purely a nervous complaint, and, like the previous affections, most frequently dependent on dyspepsia or flatulence, and a constipated state of the system. The _treatment_ must be regulated by the causes that may seem to have induced the neuralgia; though, as a local application, to allay the pain of the paroxysms, a plaster of belladonna or opium and litharge will, in all cases, be found of very great advantage, and may, irrespective of any mode of internal treatment, be kept on the chest for some considerable time. There is also another form of heart affection sometimes met with, though not universally acknowledged by the profession, called spasm of the heart, in which the treatment must depend upon the age, sex, and strength of the patient; the chief remedies, however, being the hot bath, stimulants, such as ether and ammonia, and counter-irritation by friction.