t 
306 Some reafonable Reflexions on 
their own thinking, as other Creatures do* 
where the fame Train of Ideas proceed more 
dowly, and take up many Years. 
As the Microfcope difcovers a!mod: every 
Drop of Water, every Blade of Grafs, every 
Leaf, Flower, and Grain, fwarming with In¬ 
habitants, all of which enjoy not only Life 
but Happinefs a thinking Mind can fcarce 
forbear confidering that Part of the Scale of 
Beings which defcends from himfelf to the 
lowed of all fenfitive Creatures, and may 
confequently be brought under his Exami¬ 
nation, Cfi Amongd thefe, feme are raifed fo 
little above dead Matter, that it is difficult to 
determine whether they live or no : others, 
but one Step higher, have no other Senfe 
befides Feeling and Tade : fome, again, have 
the additional one of Flearing, others of 
Smell, and others of Sight 
- It is wonderful to obferve, by what a gra¬ 
dual Progreffion the World of Life advances 
through a prodigious Variety of Species, be¬ 
fore a Creature is formed that is complete in 
all its Senfes: and, even amongd thefe, there 
is fitch a different Degree of Perfection in 
the Senfes which one Animal enjoys be¬ 
yond what appears in another, that tho J the 
Senfe in different Animals be didinguiffied 
* Vide Spettaior, Numb. 519. 
by 
