{ 22 ] 
the Eyes, it can fcarce be done truly circular, be- 
caufe one is apt to fix upon different Points fuc- 
ceflively, from each of which the £ye makes a right 
Line, and therefore would rather describe a Polygon 
than a true Circle, from the Intermiffions we are apt 
to make in purfuing fuch a View 5 but if one looks 
at the Images of his Eyes in a Mirror, without 
moving his Head, and the Mirror be moved to de- 
fcribe a Circle, then the Eyes will have a true Ro- 
tation, without the lead Intermiffion whatfoever ; or 
if the Mirror be fixed, and one defcribes a Circle 
with ones Head, keeping the Eyes fixed upon their 
Image, the fame will happen. 
XXXVII. 
Authors have given other Names to the Mufcles 
of the Eyes, befides thefe mentioned above : The 
Elevator is called the Superbus 5 the ‘DepreJJ'or, 
the Humilis 5 the AdduElor> the Bibitorius 5 the 
AbduElor, the Indignat or ius\ and the oblique Muf- 
cles, Rotatores and Amatorii . How far thefe Names 
are juftly or improperly applied, will appear in our 
Explanation of the Figures which reprefent the Paf- 
fions 5 however, we fhall here make an Obfervation 
relating to fhort -lighted Eyes, and fuch as fquint. 
XXXVHI. 
When the Eyes are very convex, their focal Di- 
’ftance is very fhort^ and therefore, when they view 
an Objeft, it is put to the Eyes* and generally held 
on one Side 5 for^ by holding it thus, they can have 
a dearer 
