108 MicROGRAPHIA: 
: oft accomplifh’d Mr. Eveliz, my highly honour'd friend, tobe 
Rab aih publithed among thofe excellent Obfervations wherewith 
his Sy/va is replenifh’d, and would therefore have been here Omitted,had 
not the Figure of them, as they appear'd through the Adcra/cope been 
before that engraven. aa 2 
~ This Petrify'd fubftance refembled Wood, in that — “ids TS 
/Firft, all the parts of it feem’d not at all diflocated, or alter'd from 
"their natural Pofition, whil ft they were Wood, but the whole piece re+ 
tain'd the exact fhape of Wood, having many of the confpicuous pores 
of wood ftill remaining pores, and fhewing a manifeft difference vifible 
enough between the grain of the Wood and that of the bark, efpecially 
when any fide of it was cut fmooth and polite; for then it appear’d to 
havea very lovely grain, like that of fome curiousclofe Wood. 
>Next Cit sled Wood) in that all the fmaller and (if I may focall 
thofe which are onely vifible with a good magnifying Gla{s) Asicrofcopi- 
¢al pores of it appear (both when the fubftance is cut and polith’d: tranf 
verfiy and parallel to the pores of it) perfectly like the Ad@cro/copical pores 
-of feveral kinds of Wood, efpecially like and equal to thofe of feveral 
forts of rotten Wood ok I — fince ere, ar bo 
fha peo and magnitude of fuch pores. It was differing from 3 
ine in weight, bine’ to common water as 3% to iaghecces there are 
few of our Exglifo Woods, that when very dry are found to be fullas 
heavie as water. | [FP aed? gt 
Secondly, in bardaeff, being very neer as hard asa Flint; and in fome 
places of it alfo refembling the grain of a Flint: and, like it, it would 
very readily cut Glaf&, and would not without difficulty, efpecially im 
{ome parts of it, be fcratch’d by ablack hard Flint: It would alfoasrea» 
ea te oragainfta Flint, asanycommon Flint.) 
- Thirdly, in the clofénef of it, for though all the Adicrofeopical pores of 
this petrify'd fubftance were very oe cuous in one pofition jyet by al 
tering that pofition of the polith'd furface to the light, it was alfomani+ - 
fe(t, that thofé pores appeard darker then the rell of the body, onely 
becaufe they were fill’d up with a more dufkie fubftance; and not be- 
taulethey were hollow. — rirodtraeeid Inwoamtok 
Fourthly, in its ixcombuftiblenef, in that it would hot burnin the fires 
nay,though I keptit a good while red-hot inthe flame of a Lamp, made 
very imtenfe by the blaft of a finall Pipe, and a large Charcoal, yet'it 
feem'd notat all to have diminith’d its extenfions but only J found it'té 
have chang’d its colour, and to appear of a more datk and\dufkiebrowh 
colour; nor could I perceive that thofe parts which feem'd co have been 
Wood at firft, were any thing wafted, bur'the parts eeiee ‘das folid and 
clofe as before. It was further obfervable alfo, tharas it did not confliame 
like Wood, fo neither did it crack’and flie like'a Flint; or fach like hard 
Stone, nor was it long before it appear'd red-hot. 25) > (os sro Os 
~Fifthly, in its difetublene(?s for putting fome dropsof diftill'd rinecar 
wpon the Stone, Efound it prefently of reste many Bubbles, jaftlike 
thole which may be obfery din fpirit of Paweyur ‘when it corrodes sonal 
We ra thoug 
