I 
Of Examining Objects. 53 
& Magnifier that can take in the Whole at 
for by obferving how the Parts lie as 
once 
to one another, we fhall find it much eafier 
to examine and judge of them feparately, it 
there be Occafion.--After having made 
ourfelves acquainted with the Form of the 
Whole, we may divide it as we pleafe, and 
the fmaller the Parts into which it is divided, 
the greater muff be the Magnifiers where¬ 
with to view them. 
The Tranfparency or Opakenefs of an 
Objed muff alfo be well regarded, and the 
Glaffes made ufe of mud be accordingly 
fuited thereto ; for a tranfparent Objed: will 
bear a much greater Magnifier than one that 
is opake; fince the Nearnefs a Glafs that 
magnifies much mufl be placed at, una¬ 
voidably darkens an opake Objed, and pre¬ 
vents its being feen, unlefs by the Micro- 
fcope on purpofe for fuch Subjects, defcribed 
page 27. Mod Objeds, however, become 
tranfparent by being divided into extremely 
thin or minute Parts. Contrivance there¬ 
fore is neceffary, to reduce them into fuch 
Thinnefs or Smallnefs as may render them 
moll fit for Examination. 
The Nature of the Objed, whether it be 
alive or dead, a Solid or a Fluid, an Ani¬ 
mal, a Vegetable, or a Mineral Subfiance, 
mud likewife be confidered, and all the 
Circumdances of it attended to, that we may 
apply it in the mod convenient Manner. If 
E 4 it 
