and■ Obfervatkns v 2 5 s 
when viewed through the Microflcope , re- 
fembles a Peacock's Feather, and is a de¬ 
lightful Objedt. The Inquhitive will find 
abundance more Wonders in this amazing 
Creature, and, indeed, in mofl Sorts of Qa~ 
ter pillars. 
18. The Silk-worm is a Creature every 
Part whereof, either in the Worm or Fly 
State , deferves our particular Attention : 
but as both Malpighi and Leeuwen¬ 
hoek have examined it with great Skill, 
and publifhed their Obfervations with ana¬ 
tomical explanatory Drawings, I fhall refer 
the Curious to them, and to their own En¬ 
quiries 5 only adviling fuch as dial! engage 
in a farther Examination, not to negledt the 
. Skins thefe Animals call: off three Times 
before they begin to fpin: for the Eyes, 
Mouth,Teeth, Ornaments of the Head, and 
many other Parts, may be difcerned better 
in the cajl-off Skins than in the real Ani¬ 
mal. A due Obfervation of the Changes 
of this Creature, from the Catetpillar to the 
Nymph , Aurelia , or Chryjalis , and thence 
to the Moth or Butterfly State , will give a 
general Notion of the Changes all Caterpil¬ 
lars undergo, though fome little Differences 
may be in the Manner. Swammerdam 
fays, the Butterfly , by a judicious Exami¬ 
nation, may be traced and^difcerned under 
each 
