According to Parkinson, the absence of abnormal physical signs in the heart of a soldier should not prevent his discharge from the army if under training or on active service he shows breathlessness and precordial pain whenever he undergoes exertion well borne by his fellows. A simple exertion test, such as climbing 25 to 50 steps, reproduces the symptoms in such a patient. The rate of the heart at rest is a little higher than that of normal men, though the increase on exertion is greater. Nevertheless, it has been proved that the increase of rate on exertion bears no relation to the symptoms elicited and is therefore without value in judging the functional efficiency of the heart. Soldier’s heart? =Case 139.= (PARKINSON, July, 1916.) A sergeant, 36, had been in the army from 17 to 29, but in 1908 he had acute rheumatism and was discharged from the army. He then became a furnace man and had shortness of breath and palpitation on severe exertion with syncope three times. He re-enlisted in August, 1914, and had an attack of orthopnea and edema after exposure at a review. However, he improved and went to France in May, 1915, where he again had symptoms; namely, precordial pain and breathlessness on severe exertion. One day while carrying telephone wire under fire, the sergeant felt a sudden pain in the region of the apex beat, shooting down the right arm. “I thought I was shot.” He fell down, very short of breath. His left arm remained sore and weak. Two days later came a similar attack, this time with unconsciousness, and the left arm was now useless. Two days later he was admitted to hospital, where slight breathlessness but no pain and no enlargement of cardiac dulness could be found. No further details are available but it seems clear that this man is unfit for duty. According to Parkinson, it is probable that the infection indicates the presence of some degree of myocardial disease. Strain and shell-shock: Acceleration of diabetes mellitus. =Case 140.= (KARPLUS, February, 1915.) An infantryman, aged 22, previously healthy and from a healthy family, was struck by a shell fragment in the forehead and lay for several hours unconscious. He did not vomit. He had a number of furuncles on his body and his urine, upon examination, showed a severe diabetes mellitus which increased despite treatment. Upon an attempt to withdraw carbohydrate, the sugar suddenly sank from six to four per cent. Acetone at the same time increased. An abrasion had been noticed by the patient a few days before the shell explosion on the spot rubbed by the _tornister_. The patient said that since his accident he had had to urinate every night several times and was often very thirsty, neither of which tendencies had he had before. A month before he became _merod_ he had had an injury of the hand produced by a shell fragment. He had undergone tremendous strain.