(5H) 
The ufe of the Cartilages in general is to give aftrength 
to fame parts, which did ftand in need of fuch Bodies as 
both were flexible and had a rigidity. Thofe of the 
Ribs are defigned to make them capable of anElonga- 
'oo, that fo they may protrude the Sternum one way, 
and drive back the Vertebra* of the Bread: the other, 
whereby there is an addition made to the capacity of 
the Breaft. Thefe Griftles ferve likewife in the contra- 
ftion of the Breaft. For having their natural Figure al- 
tered in the elevationof the Ribs , and the ampliati- 
on of the Cavity of the Thorax, they do naturally en- 
deavour t 0 regain their firft Figure, and to return into 
their proper pofture, by which endeavour they help 
fotyething towards the depreffion of the Ribs, and the 
contra&ing the Cavity, of the Breaft. 
F 1 N I S. 
L 0 N DO N: 
Printed and are to be fold by Samuel faith, at the Princes 
Arms in S. Paul's Church- Yard. 1691. 
