=Left Side.= _Behind the shoulder_ in the _upper third_ of the chest the sound is loud and somewhat harsh, the respiratory murmur being here supplemented by the noise of the air rushing through the larger bronchia. From the 13th rib the respiratory sound is alone heard and becomes weaker to the second last (17th). In the _middle third_ the respiratory murmur is moderately clear from the 4th to the 6th rib, it becomes louder and clearer to the 9th from which its force gradually diminishes and is lost over the 16th. In the _lower third_ over the 4th, 5th, and 6th ribs the respiratory sound is replaced by the sounds of the heart, each beat being distinctly divided into two sounds, the first dull and prolonged, the second short and quick. The respiratory murmur is heard over the 7th and 8th ribs, is weaker on the 9th and lost over the 10th. In the middle and lower thirds but especially towards the posterior part of the chest, abdominal sounds are often heard. They consist chiefly in gurgling or in a noise like that caused by the air rushing into a bottle which has been turned upon its side when full of water. Such sounds are easily distinguishable from those occurring in a diseased chest as they bear no relation to the rhythmical action of breathing. =Right Side.= In the _upper and middle thirds_ the sounds do not differ from those of the left side. In the _lower third_ the respiratory sound is clear from the 4th to the 7th ribs; from this it decreases and is lost at the 10th. =Ox.= In very lean cattle the respiratory murmur heard in front of the shoulder and over the scapula is more distinct than in the same region of the horse. =Left Side.= In the _upper third_ a clear respiratory murmur is heard over the 8th, 9th and 10th ribs but is lost about the 11th. In the _middle third_ the vesicular sound is feeble at the lower margin of the region and immediately behind the shoulder because of the proximity of the base of the heart. Towards the upper margin it is loud and harsh being complicated by the _tubal_ sound. It is full and clear over the 7th rib whence it decreases in force to be lost at the 11th above and the 10th below. In the _lower third_ the double heart beat is alone heard over the lower part of the 4th rib, the respiratory murmur reappears over the 5th and 6th whence it becomes weaker and is lost at the lower and upper margin of the region respectively over the 8th and 9th ribs. =Right Side.= The sounds of the _upper third_ simply repeat those of the left side. In the _middle third_ the chief difference is the greater clearness and strength of the respiratory and tubal sounds immediately behind the shoulder. In the _lower third_ a moderately strong respiratory murmur is rendered harsh by a tubal sound due to the proximity of the large bronchus going to the anterior lobe of the right lung. The respiratory murmur continues with diminishing force to be lost over the 8th and 9th ribs.