Bronchopneumonia occurs most often during the winter months, being more prevalent in late winter or early spring. One or both lungs may be involved, but the most common seat of the inflammation is the lower left lobe, or if in front only, the right apex. The local subluxation producing this condition will be found to be the second or third dorsal vertebra, which is producing the pressure upon the nerves and interfering with the transmission of mental impulses. As a result there is a relaxation of the muscular fibers of the blood vessels which results in a distention of these vessels in the affected area. The seat of the catarrhal inflammation is in the mucous membrane of the large and small bronchi. Symptoms The most frequent type of bronchopneumonia among infants is the acute congestive type. Its duration may be only one or two days. The symptoms develop very rapidly and produce a great shock to the nervous system because of the suddenness and severity of the attack. There is a sudden rise of temperature and prostration is very great from the beginning. There is cyanosis and rapid respiration. There may be no cough. There may be little or no pain felt in the chest. During respiration the expansion of the affected side will be less than that of the unaffected side. However, this must not be confused with the natural tendency found in extremely young infants; when a child is placed in certain positions the expansion of one lung will be greater than that of the other. In the severe cases there is profound stupor and other cerebral symptoms, such as dullness, apathy and there may be convulsions. The progress of the incoördination is very rapid, due to the sudden engorgement of the lungs, which in the infant produces symptoms almost the same as those of consolidation in older children or in adults. This is due to the air vesicles being extremely small. These cases should be adjusted as soon as there is a manifestation of symptoms, otherwise the momentum of the dis-ease may, because of its rapid progress, become so great that it will be impossible for Innate to overcome. When the medium and small sized bronchi only are affected, it is known as capillary bronchitis. The symptoms will be very much the same as in the type just mentioned, with the exception that in this type there is always a more or less severe cough. Prostration is not so great and the symptoms do not develop so rapidly. There is very rapid respiration with dyspnea and rales over the entire chest. There are symptoms which will indicate consolidation. While bronchopneumonia may come on very abruptly, yet it is not uncommon for the symptoms of bronchitis to merge gradually into those of pneumonia. From a chiropractic standpoint it would make little difference to the chiropractor whether the condition was called bronchitis or bronchopneumonia, for if adjustments are given at the beginning results will be obtained before a diagnostician would be able to make a positive diagnosis.