I N T R O D U C T I O N. 231 
are indeed deducible from every thing 
around us, but the extremely Great and the 
extremely Small feem to furnifh the cleared: 
and moil convincing 1 and perhaps, if duly 
confidered, the Fabrick of a World , and the 
Fabrick of a Mite, may be found equally 
driking and conclufive. 
Gl assp:s difcover to us numberlefs Kinds 
of living Creatures, whofe Minutenefs ren¬ 
ders them abfolutely undifcernable by our 
naked Eyes, and God alone knows how many 
thoufand Kinds there may be, ftill gradually 
decreasing in Size, which it is impofiible for 
us to fee by any Help whatever 5 to all thefe, 
however, we mud: believe, from reafoning 
on what we know, that Providence has not 
only appointed the mod wife Means for 
- Propagation, PreferVation, and.. Happinefs, 
but has moreover adorned them with Beauty 
equal at lead to any thing our Eyes have ever 
feen. 
The fmalled living Creatures our Indru- 
ments can fhew are thofe that inhabit the 
Waters: for though podibly Animalcules 
no lefs minute may fly in the Air, or creep 
upon the Earth, it is fcarce poflible to bring 
fuch to our Examination j but Water being 
transparent,and confining the Creatures in it, 
we are able, by applying a Drop of it to our 
Glades, to difcover (to a certain Degree of 
Smallnefs) all that it contains. My Attention 
has been therefore applied more particular- 
