ANIMAL MECHANICS. 



485 



semi-lunar valves, during life, not closing the openings of the 

 coronary arteries during systole ; for if the heart receives 

 twice the supply of arterial blood, it ought to possess a Coeffi- 

 cient of Refreshment double that of any other muscle. 



Conclusion.— I bring my work to a close with some regret, 

 as it has afforded me many pleasant hours of thought and re- 

 search. None of my readers can see its defects more clearly 

 than I myself perceive them, for I have not been able to use 

 more than a tenth part of the materials at my disposal, and I 

 feel that I have failed to convey by my words much of the 

 interest that attaches to the problems which I have endea- 

 voured to solve. 



This much, however, I can guarantee ; all the dissections, 

 weighings, and observations have been made by my own 

 hands, with every precaution of which I could think, to ensure 

 accuracy. My observations have also been made without 

 preconceived hypotheses to guide them ; and many of my 

 most interesting results have been forced upon my notice by 

 the facts placed before my eyes in the Dissecting-room and 

 Laboratorjr. 



I have done my best to travel non quo itur, sed quo eundum 

 est ; and if I have erred in attaching too much importance to 

 Geometry, as the Queen and Mistress of all the Sciences, I 

 have at least the sanction of Plato for my error, who, when 

 asked how the Divine Being spent His time, replied, yeiofxerpuv 



TOV 0£OV. 



" Errare mehercule malo cum Platone, quam — " 

 I leave my objectors to finish the quotation. 



