286 i Treatise on 
terwards appear in long, hollow, light. Pieces, of a 
beautiful white Colour, fometimes mixed with a 
Call of Red. They are then very carefully put up 
into wooden Cafks, being highly valued j and 
indeed defervedly, fince they are entirely free from 
Impurities. Next after this Sort, which we com- 
monly term Manne en iarmes , in cur Shops we pre- 
fer the Calabrian Manna, and that which is gathered 
in Apulia about the Mountain Garganus •, this how- 
ever is fomething yellow, and not very dry. After 
thefe we rank the Sicilian , which is whiter and drier. 
Laitly, the Sort which is gathered near Civita Vec~ 
ckia in the Territory of Rome , called La Tolfa , w'hich 
is dry, more opake, and heavy, is fold cheaper 
than the others, and is leaft efceemed. 
In a chymical Analyfis , two Pounds of choice. 
Manna diftilled in B, V. yielded two Ounces, fix 
Drachms, and forty eight Grains of limpid Phlegm 
void of Tafte and Smell, which yet inclined the 
Tin&ure of Turnfole to a red Colour. Then the 
Refiduum , being dried, reduced to Powder, and 
difbilled from a Retort, afforded one Ounce and one 
Drachm of clear Liquor manifeftly acid ; nine 
Ounces of reddifh empyreumatick Liquor, both 
acid and a little urinous ; two Ounces of thin red- 
difh Oil ; and two Ounces, four Drachms, of thick 
refinous Oil, concreted into Grumes. The black 
Mafs in the Retort, weighing fix Ounces, five 
Drachms, and twelve Grains, was hard, denfe, and 
void of Tafte. This being calcined for eight Hours 
in a reverberatory Fire, till it gave over fmoking, 
left fix Drachms and fix Grains of brown Afhes * 
from which were extra&ed two Drachms of fixt alka- 
line Salt. The Lofs of Parts in Diftillation was feven 
Ounces, two Drachms and twelve Grains ; in Cal- 
cination five Ounces, feven Drachms and fix Grains. 
Manna therefore is compofed of a copious effential 
or 
