V 
9 
and Qbfervations. 289 
mondy the Lamella , or Layers , compofing it, 
were very plainly to be diftinguifhed. 
35. In finking Fire with a Flint and Steel, 
little Particles of Steel are flruck off, and 
melted into Globules by the Collifion ; as 
will be evident upon making the Experiment 
over a Sheet of white Paper, and viewing 
what falls into it through the Microfcope. 
Mr. Hook fir ft made the Trial, and found 
that a black Particle, no bigger than a Pin’s 
Point, appeared like a Ball of polifhed Steel, 
and flrongly reflected the Image of the 
Window near which he examined it It 
is alfo entertaining enough to feparate the 
melted Iron Particles from the Particles of 
Stone, which fometimes are vitrified, by 
Means of a Knife that has been touched by 
a Loadftone. 
36. Kind Nature has fupplied the Seeds of 
Dandelion, Thirties, and many other Plants, 
with a Down, that ferves inflead of Wings 
to convey them to diftant Places. The Fi¬ 
gures of fuch Down, in different Plants, are 
very different when looked at thro’ Glaffes ; 
fome appearing plain and fmooth, others 
rough and thorny, and others again with 
little Hooks or Clafpers to catch hold of any 
* Hook’s Microg . p. 25. 44. 46. 
U JL 
m 
Thing, 
