chronic neurosis, such as asthma, is usually slow in its progress; and it may well happen, in such cases, that the danger to life is more on the side of serious nervous lesions than from the anginal attacks themselves. At the same time, it must be remembered that, even in the milder cases, any very unusual excitement, bringing on an unwontedly severe attack, may produce fatal results at any period of the disease. There is some reason to believe that cardiac neuralgia is occasionally produced in a reflex manner in consequence of a severe existing intercostal neuralgia. I cannot say that I have witnessed any thing which can be considered as completely proving this; but it certainly seems likely that, in some of the few cases of excessively painful herpes zoster which have proved fatal (of which I have given one example), cardiac spasm or paralysis may have been secondarily induced, and may have occasioned the catastrophe. It is likely enough that, if this was the case, the reflex irritation operated upon motor centres which themselves were predisposed to take on the morbid action; but this again is a fresh illustration of the uncertainties to which prognosis is liable in a disease like angina, the very fundamental character of which is that, upon increase of the irritation, the gravity of the resulting functional affection is liable to be indefinitely and most rapidly increased. _Treatment._--The treatment of cardiac neuralgia is (1) prophylactic, and (2) palliative of the attacks. As regards the prophylactic treatment, it is unnecessary to repeat the remarks which we have made elsewhere upon the general principles of tonic and nutritive medication in neuralgias of every kind. One especial prophylaxis, in the case of this formidable variety of neuralgia, is concerned with the preservation of the heart from certain disturbing influences which would render the occurrence of the fit more probable. All violent emotions and all strong physical exercise (but especially such forms of it as, like boating, are well known to "pump" the heart severely) are to be carefully avoided. Even indigestion and flatulence are to be carefully guarded against since these are quite capable of embarrassing the action of the heart to a degree which, though it might be trivial in the case of ordinary health, may prove fatal by exciting a flabby ventricle to irregular and embarrassing contraction. It is even possible that the strong irritation set up by some varieties of indigestible food might propagate an irritation to the spinal cord which would produce an interbitory paralysis at once.