抄録
Eleven healthy and five diseased cows, most of which had been affected with traumatic pericarditis, were held on their right side, except one which was kept in the standing position, and subjected to some thoracic operation which lasted for 30 to 120 minutes. Artificial respiration with pressured oxygen was applied to them from time to time during the operation. As a result, three cows, one healthy and two diseased, died prior to the end of the operation, the remainder withstanding thoracotomy.
1. During the thoracotomy, the oxygen in the inspiration tube of the apparatus employed was 23.60 to 61.50 (39.65) per cent and the carbon dioxide in the same tube 0.04 to 1.38 (0.29) percent.
2. During the thoracotomy, the oxygen content and oxygen saturation rate of the arterial blo-
