24 
Indian Forest Records. 
[Tol. lit. 
CHAPTER IV. 
The Barks of Mangrove Species considered as raw materials for 
Tannin Extract manufacture. 
This chapter deals with the percentage yield of the tannin extract 
from the various mangrove barks. 
The following table gives the analyses of mangrove barks, which 
have been recorded from time to time :— 
Serial 
Mois¬ 
ture. 
Tan¬ 
nin. 
Tannin 
1 
! 
i 
num¬ 
ber. 
Species and Locality. 
on dry 
mate¬ 
By whom reported. 
! 
! Remarks. 
rial. 
Per 
Per¬ 
Per 
i 
! cent. 
cent. 
cent. 
i 
i 
1 
Fresh bark of Rhizo- 
phora mucronata 
(from Tavoy) . 
... 
50 
Dr. Hunter of 
Analysed by 
Kaug-oon College. 
LowenthaPs 
method. 
2 
Dry bark of Rhizo- 
phora mucronata 
(from Tavoy) . 
4 5 
Ditto 
Ditto. 
3 
Dry bark of Rhizo- 
phora mucronata 
(from Bassein) 
... 
20 
Ditto 
Ditto. 
4 
Bark of Rhizo phora 
mucronata (locality 
not known) 
Ditto ditto 
14-22 
... 
27-29 
Professor Dun- 
5 
1317 
... 
413 
| stan. 
6 
Ditto ditto . 
8-70 
50 
5-8 
J 
y 
Ditto ditto 
10-90 
26-90 
29-50 
Mr. D. Hooper. 
8 
Ditto ditto . 
19-47 
Dr. Leather (in 
0 
Ditto ditto . 
Air- 
1898). 
dried 
... 
28-85 
Staiger. 
10 
Ditto ditto . 
Do. 
... 
25-10 
11 1 
Ditto ditto . j 
■ Hunt and Mac* 
Steam 
j fcay. 
1 
dried 
1 
29*22 
241 
