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MICROGRAP 
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Phyfiological Deferiptions «0.» : 
MINUTE BODIES: 
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MAGNIFYING GLASSES: 
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OBSERY ATIONS and INqurR res thereupon. 
Obferv. 1. Of the Pointof afbarp fall Needle... : sii 
SS.in Geometry, the moft natural way. of beginning is Sebem.2; 
4. from a Mathematical poswt; foisthefate method in Figa, 
SV Obfervations and Natural hiftory the moft genuine, fim- 
<& ple,and inftructive. We mutt firft endevour to make 
letters, and draw fingle ftrokes true, before we vené 
; % ture to write whole Sewtences ; or to draw large Pi» 
SSS Gures. And in Phyfical Enquiries; we muft endevour 
ete _to follow Nature in the more plas# and ¢afie ways the 
treadsin the moft (mple and uncompounded bodies, to trace her fteps; and 
‘be acquainted with her manner of walking there, befote we venture our 
_ felves into the multitude of meanders the Aint of a more complica: 
_ tednature; left, being unable to diftinguith and judge of our way, we 
| quickly lofe both Nature our Guide,and our selves too.and are left to wane 
BE = in the labyrinth of groundlefs opinions; -wanting both judgment, that 
light, and experience, that clew, whichfhould dire& our proceedings. 1 
| We will begin thefe our Inquiries therefore with the Obfervations of, 
Bodies of the mott fizeple wature firft,and {0 gradually proceed to thofe of a 
more compounded one.In profecution of which method,we fhall begin with - 
a Phyfical point; of which kind the Poixt of a Needle is commonly reckon’d ~ 
for one ; and is indeed, for the moft part, made fo fharp, that the naked 
eye cannot diftinguifh any parts of it: It very eafily pierces, and makes its 
| way through all kind of bodies fofter then it felf:But if view'd witha very 
_ good AMicrofcope, we may find that the ¢ep of a .u «though as er ad 
