that having accurately observed the structure 

 and properties of each body, they might the more 

 safely judge of its nature. And the advantages which 

 have arisen from hence, manifestly appear fi oni the 

 memoirs of the royal society at London, of the aca- 

 demy of sciences at Pari?, and those of the same kind 

 in Germany, as well as several other parts of Europe. 



8. To mention but a few of the late discoveries in 

 each branch of natural philosophy, with regard to the 

 structure of a human body, how many things have 

 modern anatomists discovered, which were either littje 

 understood by the ancients, or wholly unknown to 

 them? Such, for instance, is the circulation of the 

 blood discovered by Dr. William Harvey, whose 

 * ( Anatomic Exercitations," concerning it, were first 

 published in the year 1628. Such were the lacteal 

 veins discovered first in brutes by Casper Asellius, of 

 Cremona, and soon after in men. Such the thoracic 

 duct, and receptacle of the chyle, observed first by 

 Dr. John Pecquet, of Paris, whereby the whole course 

 of the blood is now clearly understood. 



9. Dr. Harvey improved natural philosophy by 

 another no less eminent discovery : for he was the first 

 of the moderns that shewed all animals to be generated 

 from eggs. That the ancients knew and taught this, 

 f Orpheus in particular) cannot reasonably be doubted. 

 But as the knowledge of it was entirely lost, to revive 

 was the same thing as to invent it. It is obvious how 

 great a light this pours upon that dark subject with 

 regard to the generation of men, as well as of other 

 animals. 



10. Another remarkable discovery in the last century 

 was that of the transfusion of the blood. The blood of 

 a young, lively, healthy animal, was transfused by 

 means of a small silver tube, properly adjusted into the 

 veins of another which was old, weak, and sickly, 

 and the effect amazed all the beholders. When the ex. 

 pertinent was tried before several of the royal society, 

 a feeble worn-out dog, ready to die with age, and 

 hardly able to trail his legs after him, was no soonar 



