what caufes thofe Pains, which are' commonly called 
After-Pains. 
XI. 
Thus is this wonderful Phenomenon brought about 
by the mufcular Stru&ure and Mechanifm of the 
Uterus ; and it may fecurely be affirmed, that if it 
was not a very Mufcle, this Effed could not come 
to pafs, no more than the Blood could be driven 
from the Ventricles of the Heart , if it were not a 
Mufcle , or the Urine from the Bladder (without a 
mufcular Coat, and a ‘Detrufor Mufcle), which are 
forced to diftend by the Intrufton of Urine from the 
Ureters, till, by its Repletion, the Reftftance becomes 
lefs at the Orifice than in the c Detrufor , This is 
more fully explained in my Defcription of the Blad- 
der $ which fee. 
XII. 
Of the Fallopian Tubes. 
Thefe Organs were known to, and well defetibedby, 
Hierophihts and Rufus Ephejlus , as the late learned 
Dr. Douglafs has very juftly obferved y altho’ they are^ 
called by Fallopius's Name by fome not well verfed itr 
the Hiftory of Anatomy. They are foft pliable Bo- 
dies, and are properly enough called Tubes or Trum- 
pets, becaufe they arife fmall on each Side from the 
Angles of the Uterus , and run larger by degrees, till 
L 2 they 
* Bibliogratkia Anatom. Specimen , p. 12 6. 
