loy 
ill tear, the canulated and flaky Manna, and the common brown 
All thefe varieties feem rather to depend upon tl 
fatM 
fpedive purity 
a 
nd the circumil 
from the plant, than upon any eflential difference of the 
which they are obtained 
\ 
when 
J 
tranfudes fi 
the 
very flowh 
Mann 
1 
ways 
more dry, tranfparent, and pure, and confequently of more eftimat 
1 
on 
but wh 
it fl 
nations mafs : h 
ows very copioufly it concretes into a 
fe 
we have a 
ftraw 
a 
nd 
fuch fubft 
receive the 
afon, why, by apply 
ho 
Manna becomes much improved : ' Houel, v 
when flowing from the tree, found it much b 
fi^.,...^ 
J 
the 
fted the manna 
th 
concrete ft 
this bitternefs he attributes to the 
in Its 
aqueous 
part 
which is then very abundant, of courfe the manna is meliorated by 
all the circumftances which promote evaporation. According to Lewis,' 
" the heft Manna is in oblong pieces, or flakes, modera<-eIy dry, friable, 
\ 
ery light, of a whitifh or pale yellow 
nfp 
th 
colour, and 
ferior kinds are moift, und;uou 
in fome deg 
d brown. 
Manna liquifies in moift air, diflfolves readily in water, and, by the 
infpiffating the watery 
alFiftance of heat, in redlified 
folution, the Mann 
firft. 
O 
recovered of a much darker colour than at 
the liq 
From the faturated fpirituous folution, great part of it fep 
nefs, and a very grateful fweetnefs 
Manna is well known as a 
g into a flaky mafs, of a fnowy white 
§ 
purg 
1 
fo mild in its 
have a very fin 
thin ftraw, or fmall bits of fhrubs, fo that the manna, in coming out, runs upon thofe 
bodies, and is colleded in a fort of regular tubes, which give it the name of manna in 
cannoli^ that is, manna in tubes : this fecond kind is more efteemed, and always preferred 
to the other, becaufe it is free and clear. There is indeed a third kind of manna, which 
is not commonly to be met with, and which I have feen after I left Calabria : it is very 
white, like fugar; but as it is rather for curiofity than for ufe, I (hall fay no more of it. 
The two forts of manna already mentioned undergo no kind of preparation whatfoever. 
Neapol 
# 
y 
generally export ; and if manna is kept in the magazines, it receives often Very great 
hurt by the Southern winds, fo common in our part of the world. The changes of the 
weather produce a fudden alteration in the time that the manna is to be gathered ; and. 
for thi 
No. 8 
when the fummer is rainy, the manna is always very fcarce 
E 
operation 
3> 
/ 
