MIcROGRAPHiAe 1or 
means of which, bethe Coal never fo long, you may eafily blow thtough 
it ; and:this you may prefently find,by wetting one end of it with Spittle, 
and blowing at the other. ist oi peep enisel 
But this is not all, for befides thofe many great, and .confpicuous.irre- 
gular {pots or pores, if a better Adicrofcope be made,ufe of, there| will ap- 
ear an infinite company of exceedingly {mall; and,very regular pores, 
E thick and fo orderly fet, and fo clofe to one aristher, that they leave 
very little room or {pace between themto be fill’d witha folid body, for 
the apparent vfer/titia, or feparating fides of thefe,pores feem fo,thinin 
fome places, that the texture of a Honey-comb cannot be moreporous. 
Though this be not .every where fo, the’ intercurrent partitions in 
fome places being very much thicker in proportion to the-holes.,;-.,)., 
Moft of thefe {mall pores feem'd to be pretty round, and weretang’d 
in rows that radiated from the pith to the bark; .they all of them 
feem'd to be continued open pores, running the’ whole length of the 
Stick 5 and that they were all perforated, I try'd by breaking. off a very 
thin fliver of the Coal crofs-ways, and then with my Aficrofcope,diligent- 
ly furveying them againft the light, for by that means I was.able to fee 
quite through them. 1g 32 | 110 JOT ; : 
Thefe pores were fo exceeding {niall and thick,that ina line of them; 
v2 part of an Inch long, I found by numbring them no lefs then: 150; 
{mall pores sand therefore in a line of them an Inch Jong, muit be no lef 
then 2700. pores, and in a circular area of an Inch diameter; muft be 
about 5725350. of the like pores; fo that. a Stick.of an Inch Diameter, 
may containe no lefs then feven hundred and twenty. five thonfand, be- 
fides 5 Millions of pores,which would, I doubt not,.feem even incredible, 
were not every one left to believe his own'eyes.. Nay, having fince ex- 
amin'd Cocws, black, and green Ebony, Lignum Vita, &c. 1 found, that all 
thefe Woods have their pores, abundantly {mallerthen thofe of foft light | 
Wood; in fo much, that thofe of Guajacum {eem’d. not above an eighth | 
part of the bignefs of the pores of Beech, but then the. Interftitia were 
thicker 5 fo prodigioufly curious are the contrivances, pipes, or fluces by 
which the Succus nutritins, or Juyce of a Vegetable is convey'd from 
place to place, | e: thew § . 
This Obfervation feems to afford us the true reafon of feveral Phe- 
nomena of Coals ; as | : . 
Firft, why they look black; and for this we need go no further then 
the Scheme, for certainly, a body that has fo many | a in it as thisis dif- 
cover'd to have, from each of which no light is reflected, muft neceflarily 
look black, efpecially, when the poresare fomewhat bigger in proporti- 
ONto the intervals then they are cut in the, Scheme, black bein nothing 
ta privation of Light, or a want of reflection; and wherefover 
this reflecting quality isdeficient, there does co at look blacks whe- 
ther it be from a poroufneG of the body, asin thisInftance,or in adeadnin 
and dulling siieliew tech as I have oblerv'd in the Scorie of Lead, Tin, 
Silver, Copper, ee : ; 
As Cs Sous ’ é 2 re ° 
Next, we may alfo as plainly fee the reafon of itsfhining quality, om 
et; 
