MicrocGrapMiay 161 
ave lately difcover'd like thofeof'a Sponge, and:perhaps ail thefe thie 
bodies may be of the fame kind of fubftance;:though two.ofthetnindeed 
are’ commonly accounted Vegetable (‘which s>whethdro they be!fowk 
20,1 ‘fhall not’ now. difpute y But thiseemis common td alk three sthad 
| _ they undergo atanning or drefiing, wherebywthe interfpetsid bjuitesiane 
| » wafted and wath'd away before the texture of!them cam be tifcever'd/)} 
What their way. is of drefling, or curing Sponges, | Iconfels): Ircanho’ 
learn; but the way of drefling spwzk, is, by boiling it a good whilé infg 
{trong Lixivinm, and then beating it very well ; andthe manner of dref= 
fing Leather is fufhciently known: "2353 3) 
It were indeed extremely defirable, if fuch a way could be found. 
whereby the, Parenchyma, or fiehh of the.Mulcles, and feveral.o 
NRA be wath’d, ‘ot ‘whhod Ritghe SAR em 
ting the form of the fbrow parts or veflells of it, for hereby the texture 
of'thofe parts, ‘by the help of'a good» Adicrofedpey might) be! molt ‘aécut 
rately found. = °° Nosy iso ae bbs yxo0 Henbb2tom g if 
* But to digrefs no further; weamay, fromthis difcovery of the tfcro- 
Scope; plainly enough underftand: how the fkiny: though it’ looks fo clofe 
asit does, comes to givea paflage to fo vaft aquantity of excreméntitions — 
fubftances, as the'diligent Sauéforiw:has excellently obferved:it todo, in 
his'medicina flaticas for it feems very probable, fromthe texture after 
| drefling,that there are an infinit of pores that every way pierceitjand that 
thofe pores are onely fill’d with fome’ kind of juice, or foméwéry-p 
foft fub{tance, and thereby the fteams may almoftias eafily finda palia 
through fucha fluid: vehicle as the vaporous bubbles which ard generated 
at the bottom of a Kettle of hot: water do find aipaflage through that 
fluid wedinm into the ambient Air.) 8 
Noristhe fkinofanimals only thus pervious,buteven thofe of vegetables 
alfo feem to be the fame;for otherwifé I cannot conceive why,iftwo {prigs 
of Rofemary (for Inftance) be taken as exadtly-alike in all particulars as 
can be, and the one be fet with the bottom in a Glafs/of watery and the 
other be fet juft without the Glaf,but in the Air onely; though-you ftop 
the lower end of that ‘in the Air very carefully with Wax, yet fhall ie 
prefently almoft wither, whereas the other that feems to havea fupply 
from the fabjacent water by its fmall pipes, or microfeopical pores, pre 
ferves its greennefs for many days, and fometimes weeks, ©. sil) yi gaa 
~ Now, this to me, feemsnot likely to proceed fromany other caufe then 
the avolation of the juice through the thins for by the Wax,all:ithofe other 
Poresiof the ftem are very firmly and clofely ftopd up. And fromthe more 
orlefs poroutnefS of the fkins ortinds —— ease 
hat of the reafon given, why they keep longer green, Or looner Wir 
ther; for we may stereos tis Hiatideribg and craking of the leaves of 
fy Holly, Laurel; @c. that their {kins aon? ¢lofe; and do not fuffer 
a pafiage through them of the included juices. 
But of this, and of aa of the Rofemary; I fialtelfewhere 
Pog confider,it feeming to me an see pir 
a inde i “prove the Schematifm or g 
: $ feems indeed very plainly to os chematifn ox § of 
