Pneumonia, or Lung Fever.

Pneumonia, or Lung Fever.

Pneumonia is inflammation of the lungs. The chief varieties of pneumonia are catarrhal later discussed in connection with bronchitis, under the name of broncho-pneumonia and the fibrinous or croupous variety. The latter form receives its names from the fact that the air spaces are choked with coagulated fibrin thrown out from the blood. This causes the diseased portions of the lungs to become as firm as liver, in which condition they are said to be hepatized. As air is excluded by the inflammatory product, the diseased lung will not float in water.