( |4?o ) 
a Socket, between two Silver Plates rivetted together, 
and pierc’d with a finall Hole : The Objed is placed 
on a Silver Point, or Needle, which, by Means of 
Screws of the fame Metal, provided for that Parpofe, 
may be turn’d about, rais’d, or deprefs’d, and brought 
nearer, or put farther from the Glafs, as the Eye of 
the Obferver, the Nature of the Objed, and the conve- 
nient Examination of its feveral Parts may require. 
Mr. Leeuwenhoek fix’d his Objeds, if they were folid, 
to this Silver Point, with Glew^ and when they were 
Fluid, or of fuch a Nature as not to be commodioufly 
view’d unlefs fpread upon Glafs, he firft fitted them on 
a little Plate of Talk, or exceflively thin-blown Glafs, 
which he afterwards glewed to the Needle, in the fame 
Manner as his other Objeds. 
The Obfervation, indeed, of the Circulation of the 
Blood, and fome others, require a fomewhat different 
Apparatus^ and fuch a one he had, to which he occa- 
fionally fix’d thefe fame Microfcopes, but as it makes 
no Part of this Cabinet, I lhall omit giving any farther 
Account of it, only taking Notice that it may be feen in 
a Letter to the Royal Society, of the 1 2th of January, 
1689. and printed in his Arcana Naturdi DeteBa, 
2 V°. 69. But I was willing to mention juft fo much, as it 
may ferve to fhew the univerfal Ufe of thefe Micro- 
fcopes, and as it induces me (among other Things) to 
believe, thefe were the Kind of Microfcopes generally, 
if not folely,, us’d by this curious Gentleman in all his 
Obfervations, and to which we are obliged for his inoft 
furprizirig Difcoveries. 
Another Particular, to the fame Purpofe, I would 
not omit, and that,% That upon th«. late Qpeen Mary's 
» doing 
