[ 38 J 
ned that wearing it would preferve the Party from 
the Attack of that Diftemper, 
There are many Sorts of florid Jafpers, difirin- 
guifhed by a great Variety of Colours; fome of 
them have by the Hand of Nature delineated on 
them Reprefentations of Rivers, Trees, Landfcapes, 
Ruins of Buildings, &c. 
Egyptian pebbles are a particular fine Kind of 
variegated and figured Stones; thofe of them that 
have but one Colour are leaft valuable. 
Marmora. Alabaftra. 
Under thefe Titles are preferved a great Variety 
of Specimens of the icverai Kinds of Marble and 
Alabafter. 
Marble is an opake precious Stone, ftrikes Fire 
with Steel, and yields eafily to Calcination : It is 
generally found in great Malles under the Ground, 
and cut out of Quarries, though there are in feveral 
Fart of the World entire Mountains of Marble; it 
differs in Colour in almoft every Country, but the 
Florence Marble for the mo ft part bears a natural 
Refembiance to the Ruins of Towns, Rocks, 
Alabafter is of the fame Nature as Marble, but 
of one fimple Colour, fofter, and, when cut into 
thin PIates ? femi-transparent. 
Spata. Selenites* 
In this Repofitory are Spars and Moon-flones. 
The Spar is a fhining Stone, compofed of cryftaline 
and earthy Matter; it does not flrike Fire with 
Steel, but yields a whitiffi Powder on Calcination. 
Thefe Stones are frequently found in Caves, Grot¬ 
tos, Clefts pf Rocks and Mines; they fhoot like 
‘ f w r! 1 • x : Salts 
