322 Journal of the Asiatic Society of Bengal. [N.S., XV, 
time factor will be easily noticeable from the results given in 
the Table 1. The sample described under ‘ Til Oil A, No. 3” 
is really an excellent one. Exposure to the air for some 
months has also had a marked effect on the results. This was 
to be expected from a semi-drying oi 
TABLE l. 
The oil was ape with excess of the material named in 
column No. II and heated in a basin with stirring for from 
ir in contact with the substance in a dark cup-board, and in 
the case of ‘ Til oil B’ allowed to settle for twenty hours, fil- 
tered and put into closed vessels. 
, II ? III IV 
Tr, Om A Tr. Om B 
No,| Substance with All samples except 2(a) and Samples were fil- 
which the oil (6 (2) were left in contact with the| tered and bot- 
‘ stance mentioned in wg . tled at once. 
3} to 4 months expos 
mith air anid then filtered wie 
bot 
—_ 
| Filtered -. | Control sample. Control sample. 
bo 
ey 
4 
cy 
g 
g 
® 
4 
(a) Filtered at once. Marked | No  impro 
| charcoal. improvement in colour ment in colour 
| (6) Filte — after ‘about 4 /| or smell. 
nths. el 
| ‘| improve 
3 Animal char-| Sourceunknown. Anexcellent | Hopkins & Wil- 
' coal. sample, nearly white. Smell liams. Marked 
yiaiat improved and not unpleas- | diminution in 
ant. colour. Second 
best sample in 
this set. 
4 | Fuller’s erg Noimprovementin colour, taste| No improve- 
crude lum or smell. ment. 
5 | Fuller’s earth,| Not tried. A marked im- 
precipitated. provement in 
colour. 
The best sam- 
ple of this set. 
