Mr. Leeuwenhoek’s Microfcopes. 435 
and a Hole drilled in each Plate for the 
Eye to look through at c . A Limb of Silver 
d is faftened to the Plates on this Side by a 
Screw e which goes through them both. 
Another Part of this Limb, joined to it 
at right Angles, paffes under the Plates, 
and comes out on the other Side ; vid. 
Jig . 8) at f: through this runs, direct¬ 
ly upwards, a long fine-threaded Screw 
g, which turns in and raifes or lowers the 
Stage h, whereon a coarfe rugged Pin i for 
the Objedt to be faftened to, is turned about 
by a little Handle k \ and this Stage with the 
Pin upon it is removed farther from the 
magnifying Lens, or admitted nearer to it, 
by a little Screw /, that paffing through the 
Stage horizontally, and bearing againfl the 
Back of the Inftrument, thrufls it farther off 
when there is Occafion. The End of the 
long Screw g comes out thro* the Stage at 
?n, where it turns round, but aCts not there 
as a Screw, having no Threads that reach 
lo high. 
Thefe Microfcopes are plain and fimple 
in their Contrivance. All the Parts are Sil¬ 
ver, fafhioned by Mr. Leeuwenhoek 's own 
Hand, and the dalles, which are excel¬ 
lent, were all ground and fet by himfelf. He 
glewed one orat mod two ObjeCts on the Point 
of the Pin belongingto each Microfeope, and 
carefully preferved them there ; fo that each 
Inftrument being devoted to one or two Ob- 
F f 2, jeCts 
