478 modp:kn developments of harvev's avork. 



increase their tissue activity, will throw their juices or the i)roducts of 

 their functional activity into the general circulation, and thus influence 

 the invasion or progress of disease. As I have alieady mentioned, we 

 are able to influence the circulation in muscles both by voluntary exer- 

 tion and by passive massage, and we should expect that both of these 

 measures wouhl influence the constituents of the blood generally, and 

 such, indei'd, appears to be the case, for J. K. Mitchell ' has found that 

 after massage the nundjer of blood corpuscles in the circulation is very 

 considerably increased. 



Had time allowed it, I had intended to discuss the modifications of 

 the heart and vessels by the introduction of remedies into the (ircula- 

 tion, the ])(>\ver of drugs to slow or strengthen, to (|uickeii oi- weaken 

 the power of the heart, to contract or relax the arterioles, to raise or 

 lower the blood pressure, to relieve jiain, or to remove dropsy ; but to do 

 this would require time far exceeding that of a single lecture. More- 

 over, the methods and results were admirably expounded to the college 

 by Dr. Leech in his Croonian lecture, and I have therefore thought 1 

 should be better fulfilling the wish of Harvey that the orator of the 

 year should exhort the fellows and members of the college to searc-h 

 out the secrets of nature by way of experiment by directing their 

 attention to fields of research which have received at present little 

 attention, but promise results of great practical value. Lastly, I have 

 to exhort you to continue in mutual love and aflection among your- 

 selves; and it seems to me that the best way of doing this is to direct 

 your attention to the examples of Harvey and of our late president, 

 whose death we deplore to-day. They were beloved by their fellows 

 while they lived, their loss Av^as lamented when they died, and they 

 have left behind them an exami)le not only of goodness*, but of courage. 

 Harvey, seated si)eechless in his chair, distributing rings and parting 

 gifts to his friends while awaiting the approach of death, and Andrew 

 Clark, steadfastly determining to continue at work and die in harness, 

 in spite of the hemoptysis which seemed to threaten a speedy death, 

 afford us noble examples which ought to encourage us to follow the 

 directions of the venerable Longfellow, who, taking the organ Harvey 

 studied to symbolize such courage as Harvey and Clark showed, says: 



Let us, then, be up ;ind doing, 



With a heart for any fate; 

 Still lu^hieving, still pursuing, 



Learn to labor, and to wait. 



'American Jonrual of Medical Science, May, 1894.* 



