(Ll)c ^orltj'fii Unatomtfitfi 



us, is named Pander's nucleus pedunculi 

 cerebri. 

 Pecquet, Jean.— A French anatomist and 

 surgeon of Dieppe, born 1622; died 1674. 

 He practiced first in Dieppe, and subse- 

 quently in Paris. In 1651, he made 

 known the discovery of the receptacle 

 of the chyle and its continuation as 

 the thoracic duct, which he says he 

 had come upon years before while 

 studying at Montpellier. He elaborated 

 the discoveries of Aselli. In 1652, Van 

 Horn made known the same discovery 

 independently of Pecquet. 



Petit, Francois Pourfour du A French 



surgeon and anatomist, born 1718; died 

 1794. He first described what has been 

 since called the canal of Petit, — a saccu- 

 lated canal which encircles the crystal- 

 line lens. 



Petit, Jean Louis — A French surgeon, 

 born 1674; died 1750. This is the sur- 

 geon for whom Petit's triangle is 

 named. His name is associated with 

 several operations, especially herniotomy 

 without opening the sac. His fame 

 was so great that he was called to Po- 

 land to treat Augustus the Strong, and 

 also to Spain. Frederick the Great and 

 other sovereigns sought his pupils for 

 field surgeons. 



Payer, Johann Konrad. — A Swiss anato- 

 mist, born at Schaffhausen in 1653; died 

 there in 1712. Peyer's patches, or 

 glands, in the walls of the small in- 

 testines were first described by Peyer 

 in 1677. Claimed that he discovered 

 them in 1673. 



52 



