Purification of Gum Resin fyc. 
53 
Ammonia 
Galbanum 
treated by 
water alone. 
Galb. treat- 
ed, 1st with 
500 gr. wa- 
ter, and 2d, 
with 125 gr. 
alcoh. at 22° 
Sagapenum 
treated as 
preceding. 
Names. 
Tears. 
Tearlike 
mass, some- 
what soft. 
Somewhat 
soft masses 
mixed with 
tears. 
Somewhat 
soft masses. 
Quantity of\ 
Gum Resin. 
225 gr. 
125 gr. 
224 gr. 
222 gr. 
Quantity 
obtained. 
25 gr. 
125 gr 
26 gr. 
28 gr. 
1 Loss. 
Not so 
strong. 
idem, 
idem. 
idem. 
pared to un- 
purijied. 
\ Smell com. 
Brittle mass 
of a gray co- 
lour,verging 
on yellow. 
Grayish co- 
loured com- 
pact mass, 
somewhat 
soft. 
Mass re- 
sembling in 
consistence, 
&c. white 
pitch. 
Resembling 
except in 
taste and 
smell, the 
preceding. 
Appearance 
Sfc. 
27 gr. 
98 gr. 
42 gr. 
22 gr. 
Quantity 
of residue 
Impurities as before 
mentioned. 
Resinous mass, of a 
straw yellow colour, mix- 
ed with vegetable frag- 
ments. 
Vegetable fragments, 
only a trace of gum resin. 
Vegetable fragments, and 
earthy impurities mixed 
with one-sixth of basso- 
rine. 
Character of Residue. 
With the exception of the gum ammoniac, which retained 
in a great measure its natural appearance, these gum resins 
gradually assumed a brownish colour, so that in a month 
they were very different from what they were immediately 
after their purification, 
From these experiments, it appears to me that some of the 
earlier authors were right in advising the use of water, and 
that the best way is to use a sufficient quantity of this fluid 
alone when the gum resin is in tears ; but when it is in masses 
