Observations on some of the most frequent and important diseases of the heart.

Burns described endocarditis and reported three cases of mitral stenosis. He recognized the thrill present in the latter condition and seems to have understood the mechanism of a cardiac murmur. He also described unilateral paralysis of the diaphragm resulting from pressure on the phrenic nerve by a thoracic aneurysm. Burns was also among the first to suggest (see p. 136) that angina pectoris is an expression of coronary obstruction. Biography by J. B. Herrick, 1935.