BULLETIN OF THE BUSSEY INSTITUTION. 37 
to 600, of this tea-ash proper is soluble in water, and the composition of 
the original ashes has been determined as follows: — 
Spooner.* Hague.* Zeeller. 
+2 te III. 
re: || 5) F 30.84 39.22 
i... 8.66 10.67 (?) 0.65 
Se vieete fs ss 5. 0090 7.43 4.24 
MPA as ww fl CLUS 6.17 6.47 
erro 5 . . . ,. 6.13 4.32 4.38 
Phosphoric acid. . . . . 10.33 15.12 14.55 
DOM. =. , . - 6,27 4.40 trace. 
DMEM se ss oe. 0.91 1.99 0.81 
Silica, sand, and charcoal . 15.31 15.88 4.35 
eT: 3.83 24.30 
Oxides of manganese. . . 1.03 
99.76 100.65 100.00 
In thirty-six samples of ash, from wnadulterated teas, Wigner (as cited 
in the note) found amounts of alkali soluble in water that, calculated 
as potash, ranged from 22.89% to 33.10% of the total ash, and from 
43.339, to 62.67% of the soluble portion of the ash; or, on the average, 
to 28.520, of the total ash, and 540, of the soluble part of the ash. 
On thoroughly leaching tea, that is to say, on boiling the commercial 
article repeatedly in fresh quantities of water, till the liquid no longer 
becomes colored, the spent leaves will amount, when air-dried, to about 
50% of the original, in case it was green, or to about 60% if the tea was 
black (Allen). The air-dried spent leaves contain only from 1.6% of 
ash (Hodges), to 4.39 (Allen). Dried at 100°, they contain 3.06% 
of ash (Zeller). Only 12.1% of the ash of the leached leaves is soluble 
in water (Allen). The composition of the ashes of spent tea leaves, and 
of the extract obtained from tea leayes by means of water, have been 
determined as follows: — 
Ash of spent tea Ash of extract of Ash oa of 
ea. 
leaves. tea. 
. (Zoeller. ) (Zoeller. ) (J. Lehmann.t) 
SIS ete e) ay 4) 04 55.15 47.45 
Ig at oc. 0.69 0.68 6.94 
Magnesia, . . . -°.- 11.45 3.13 6.84 
ee os» 10,76 0.95 1.24 
Pie OLATON ss.) «. » ., 9.58 1.73 8.29 
Manganese Oxides. . . 1.97 0.43 0.71 
Phosphoricacid. . . . 25.41 7.89 9.88 
Sulphuricacid . . . . trace trace 8.72 
ees.) , 5. . trace 0.81 1.70 
Mises enasand. . . . 7.57 2.92 3.40 
Carbonic acid, &c. . . . 25.28 26.31 10.09 
100.00 100.00 100.26 
* “ American Journal of Science,” 1851, 11. 250. 
+ Liebig’s “ Chemische Briefe,” 1859, 2. 182. 
