LOOKING-GLASS. 
1 03 
On Ihuining and Leaping. 
Running differs from walking no Icfs in pace 
than the manner of performing this exercife. 
The hind part of the foot, according as we raife 
it, is contrafted to fuch a degree as only to touch 
the ground with the toes, while the foies are fuf- 
pended. For this reafon, thofe living creatures 
who lay down all their feet, are flow ; fuch as man, 
and the bear ; thofe are fvidfter who ufe only their 
toes j and the fwifteff run on tiptoes, as dogs, deer, 
and horfes do. 
At the fame time that the leg is r^ifed by pliable 
mufcles, the knee advances, and the thigh moves 
more forcibly ; fo that the alternate angles form- 
ed by different joints become more pointed, and 
the bones, by ffretching, take a larger compafs 
around the bafis and the line that they follow, 
confequently with a fafter motion. 
The balance is vifibly kept forward, rather in an 
ungraceful manner, as it would be impoffible to 
run quite upright : the arms keep pace with the 
body, whofe weight quickens the march, and 
checks the refpiration. 
A leap exceeds a race in violence, as much as 
running furpaffes a common pace. It requires 
no great exertion of the limbs, for the heels 
rife j the legs lean forward upon the feet, while 
H 4 the 
