SMITHSONIAN MISCELLANEOUS COLLECTIONS. 



279 — — 



THE TONER LECTURES 



INSTITUTED TO ENCOURAGE THE DISCOVERY OF NEW TRUTHS 

 FOR THE ADVANCEMENT OF MEDICINE. 



Lecture III 



ON STRAIN AND OVER-ACTION OF THE HEART, 



BY 



J. M. DA COSTA, M.D., 



PROFESSOR OF PRACTICE OF MEDICINE IN JEFFERSON MEDICAL COLLEGE, PHILADELPHIA | 

 PHYSICIAN TO THE PENNSYLVANIA HOSPITAL, ETC. 



DELIVEKED MAY 14, 1874. 



WASHINGTON: 

 SMITHSONIAN INSTITUTIONo 



AUGUST, 1S74. 



