228 
: bark contains a considerable quantity of tannin, and we are of 
opinion will prove a valuable addition to our list of tanning materials. 
| (Signed) ^ Hunt AND MACKAY. — 
In iced to "um the bulk and the freight UN on the crude 
mangrove bark, an effort has been made to extract the tannin from it 
locally, id forward the latter, in the form of a hard paste or cutch, to 
this country. Various experiments have been made from time to time 
in this direction. The latest of these experiments was t oe ~ Jamaica, 
and the result, though unsatisfactory at the moment, ma sefully be 
placed on record for the e guidance of those who may be reete in the 
subject in other colonies. 
DinECTOR oF PuUBLIC` eee AND Poanta RING, JAMAICA, to 
L GarpENns, Krew 
Dear Dyer, Kingston, Jamaica, 21st November 1890. 
I sEND by same post a block of concentrated juice of the 
‘mangrove (Rhizophora) bark. The bark is used here extensively for 
tanning, and it occurs to me that the pde extracted in this form 
alue. i 
mi f considerable commercial v The stir about the 
em gai is bringing forward many experiments which otherwise might 
not be noticed. I should be very glad if you em: A an opinion for 
me as to em commercial value of the e nii 
urs, &c. 
‘Fhe Director, Royal Gardens, Kew. . (Signed). W. FAWCETT. 

The Right Hon. W. L. Jackson, M .P., to Roya GARDENS, n 
Treasury Chambers TIS S.W., 
Dear Mm. ID March 1 
I must apologise to you for not bey an i n E analysis 
obtained of the sa Tm of extract which you forwarded to me 
beg to enclose it 
Following our conversation on the subject, I think the most practical 
way of testing the commercial value of the extract would be to obtain a 
by several firms. If your friends in Jamaica will send a quantity, 
say 20 cwt. of it, I will endeavour to obtain the practical opinions of 
several of the tanners in this ; country, and I shall be glad to pr rotect the 
; e i 
gambier of a firm in this country, and are thoroughly responsible 
ef respectable people, with whom I have done business a grea at many 
JU 
1 l can be of any further assistance pray Mn me. 
= (S ee w L. Jacksoni? 
W.T. bregi e » M.G, PES, : 
| Royal Gardens, Ke 
