[ >5 ] 
But if you examine any Objed either on the 
Steel Wire O, or in the Glafs Tube K, the Fi¬ 
gures on the Pillar are not to be regarded, be- 
caufe the SteeifWire Hands higher on the Stage, 
and the Tubes imderneath -,fo that your Sight and 
Judgment rauft guide you in this, by moving 
the Stage up or down till you come nearly to the 
Focus, and then by the Afliftance of the ad- 
jufting Screw, as before, you’ll fee the Objed 
diftind. The fame mull be obferved when 
you ufe the Concave R, the Glafs VefTel S, or 
the Filh-pan I, as a fmall Experience will pre- 
fently fhew. * 
If you would view an opakc Objed, fit the 
little Block P on to the End of the Wire O, and 
if the Objed be white place it On the black, if 
black on the white fide: Then put the Cylinder 
N (with the Silver Speculum l at the End of it) 
over the Snout of the Microfcope ; bring the 
top Edge of the Cylinder to the Figure on the 
Snout, anfwering to the Figure of the Magnifier 
you ufe, then Aide the Collar E up or down till 
you fee the Objed tolerably clear, fix it-tight by 
the Screw Button 3 as before direded, and then 
bring it exadly to the Focus by the adjufting 
Screw 4. If your Objed is large, fuch us. a com¬ 
mon Fly, this Contrivance does not fo well an- 
fwer, but the Convex Lens G muft be made 
ufe of, by a Light being thrown through it, front 
the Sky or Candle. 
It will be needfary, for the more diftindly 
viewing any Objed, that care be taken the Glaf- 
fes are kept very clean, which may be done by 
wipeing them with a clean linnen cloth, having 
firft breathed on them, or dipped them in Spi¬ 
rits of Wine. 
A DE- 
