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CHAP, VII. 
Of the Microfcope for Opake OhjeSlsi 
• * ■ ; . 7 * ; 1 ■' , ‘ » 
| " 1 HIS Microfcope remedies the Incoa-f 
venienee of having the dark Side of 
an Objedt next the Eye, which has hitherto 
been an unfurmountable Obfirudtion to the 
making Obfervations on opake Objects 
with any confderable Degree of Exadlnefs 
or Satisfadtion for in all other Contrivan¬ 
ces commonly known, the Nearnefs of the 
Inftrument to the Objedt (when Glades 
that magnify much are ufed) unavoidably 
overfhadows it fo much, as to render its 
Appearance obfcure and undiRindt. And, 
notwithstanding Ways have been tried to 
point Light upon an Objedt, from the Sun 
or a Candle, by a convex Giafs placed on 
the Side thereof, the Rays from either can 
be thrown upon it in fuch an acute Angle 
only, that they ferve to give a confuted 
Glare, but are insufficient to afford a clear 
and perfedt View' of the Objedt. 
But in this new Microfcope, by means 
of a concave Speculum of Silver, highly po- 
lifhed, in whole Center a magnifying Lens 
is placed, fo diredt and ftrong a Light is 
refledted upon the Objedt, that it may be 
examined with all imaginable Eafe and 
Pleafure* 
The 
