FOLKES’S FINAL DISCOURSE 105 
satisfied, who shall apply himself to the Examination of 
some of the same Objects as do yet remain before these 
Glasses ; at least, I have my self found so much Difficulty 
in this Particular, as to observe a very sensible Difference 
between the Appearances of the same Object, when 
apply’d by my self, and when prepared by Mr. 
Leeuwenhoek, tho’ view’d with Glasses of the very 
same Goodness. 
I have the rather insisted upon this, as it may be a 
Caution to us, that we do not rashly condemn any of 
this Gentleman’s Observations, tho’ even with his own 
Glasses, we should not immediately be able to verify 
them our selves. We are under very great Disadvantages 
for want of the Experience he had, and he has himself 
put us in Mind, more than once, that those who are the 
best skill’d in the Use of Maenifying-Glasses, may be 
misled, if they give too sudden a Judgment upon what 
they see, or ’till they have been assured from repeated 
Experiments. But we have seen so many, and those of 
his most surprizing Discoveries, so perfectly confirm’d, 
by great Numbers of the most curious and judicious 
Observers, that there can surely be no Reason to distrust 
his Accuracy in those others, which have not yet been so 
frequently or carefully examin’d. 
Upon the whole, it is to be hoped, some of the Society 
will pursue those Enquiries, the late Possessor of these 
Microscopes was so deservedly famous for; and that as 
we have lost in Mr. Leeuwenhoek a most worthy Member, 
and a most valuable Correspondent, this last Piece of his 
Respect to the Royal Society will not only enrich our 
Repository, but both encourage and enable 
some other diligent Observer 
to prosecute the same 
curious and useful 
Discoveries. 
