Camera-Obscura Mkrofcope. 25 
it is proper to inform the Reader, that fuch 
a Screen is ufually compofed of a Sheet of 
the larged: Elephant Paper, drained on a 
Frame, which Hides up or down, or turns 
about at Pleafure on a round wooden Pillar, 
in the Manner of fomeFire-fcreens* Larger 
Screens are likewife made fometimes with 
feveral Sheets of the fame Paper paded to¬ 
gether on Cloth, and let down from t^e 
Cieling with a Roller, like a large Map* -t- 
This Micro icope is the mod entertaining 
of any ; and, perhaps, the mod capable of 
making Difcoveries, in Objedts that are not 
too opake : as it fhews them much larger 
than can be done any other Way. There 
are alfo feveral Conveniences attending it, 
which no other Microfcope can have : for 
the weaked Eyes may ufe it without the 
lead Straining or Fatigue: Numbers of Peo¬ 
ple may view any Qbjedt together at the 
tame Time, and, by pointing to the parti¬ 
cular Parts thereof, and difcourfing on what 
lies before them, may be able better to un¬ 
derhand one another, and more likely to 
find out the Truth, than when, in other 
Microfcopes, they mud peep one after an¬ 
other, and perhaps fee the Gbjedf neither in 
the fame Light, nor the fame Pofition. Such 
too as have no Skill in Drawing, may, by 
this Contrivance, eadly fketch out the exadt 
Figure of an Objedt they have a Mind to 
preferve a Pidture of ; dnce they need only 
faden 
