k fo tradable and foft y that it rcfembleth well enough 
^ very fine Lambs-skin dreffed white. He thickens and 
thins it, to what degree he pleafeth, and thereby maketh 
it: like either to a very white Skin^ or to a very white Pa- 
per ; both which rcftfts the moft violent fire, as hath 
been experimented feveral times, Firft, The Skin was 
CoverM with kindled coals, whence it took flame, but 
being taken out after it had been left there a while , the 
fiery colour prefently difappear'd, and it became cold 
and white again as before ; the fire^it (ecms^pafling only 
thorough, without wafting or altering any thing of it 5 
whereas fome of thehardeft and folidefl: Mettals5as Iron 
and Copper 3 reduced to very thin plates 9 and kept as 
long in the fire as this fubftance was, would caft Scales* 
Again, This Skin being made as thin as Paper, doth not 
only ycild that ancient and fo much admired Aminnthusy 
but is alfo perfeder than that which comes from Cyprus, 
and not inferiour to that, which fometimes, though hut 
feldom, comes out o( Ciina. This Paper was alfo tryed 
in the fire, and there it remained likewife without any 
vifible detriment, or without the leaft change of its firft 
whitcnefsj fincnefs, or foftnefs* Of the fame matter this 
Artift hath wrought a f^^^J^, never to be confumed a$ 
long as *tis fed^ nor altering its quality after the alinjeut 
is wafted away* And if that famous and incombuftible 
Oyl were found out again,v/e read of,this matter would i 
yeild the Week for that everlafting Light^fonjuchcelc * 
brated by the Antients. 
The Inventor promilfeth to make farther Experi- 
ments with this fubftance, for other difeoveries. At the 
prefent he is refolved to prepare of it fuch a quantity of:; 
Paper,as may make a Boofc,andj:o cover it with the Skin 
made of the fame, and to fow it together with thread: 
made of the fame , and to write in it Letters of Gold 5 
fo that fuch a Book, being made in all the parts of it 
ipcpmbuftible, and everlafting againft the power and 
iijjuries of all the Elements ^ as being proof aga^nft the 
^"ftrongeft 
