122 



these " Divi-Divi" pods and the barks of the red and white man- 

 groves appear to be in regular use in the Colony. 



There appears to be a small export trade in tanning materials ; 

 thus, in 1903,478 tons* of Divi-divi pods were exported, princi- 

 pally to Germany, France, and the United Kingdom, and in the same 

 period, 133 tons of bark were exported, part of which was pro- 

 bably bark for tanners' use. Comparison with Dominica, where 

 tannin-yielding plants, such as Cassia Jisliilaf C. Siameaf and 

 ( TenninaUa Catappa),^ " are found, and with Mauritius, where 

 " Badamir bark" {Tcrminalia Catappa), and "Jamrose bark" {T. 

 Manriiania) occur, lends support to the supposition thai these 

 plants also occur in Jamaica. 



Only about a year ago different Australian species of Eucalyp- 

 tus appeared on the European market, such as Eucalyptus occi- 

 dcntalis (Mallet Bark) and E. oleosa (Morrel Gum), containing 52 to 

 55 per cent, of tanning materials : the export of these new materi- 

 als has been a great success. I find that in the West Indies dif- 

 ferent kinds of Eucalyptus are to be found, especially E. punctata. I 



It seems that the Logwood industry suffers in Jamaica through 

 the so-called "Bastard Logwood," which does not contain the dye 

 stuff, and according to F. S. Earle, late of the New York Botani- 

 cal Garden, who has been in Jamaica,§ " a wise policy would 

 ensure the prompt destruction of such trees whenever detected, as 

 they have no value except for firewood, and should not be allowed 

 to produce seeds." A. G. Perkin, and also the present writer have 

 found that there is a close relationship between the tannins and 

 colouring matters in the plants. The relation between the Divi- 

 divi and Algarobillal" plants containing 40 to 50 per cent, tan- 

 nins, with the logwood, makes it probable that the " Bastard 

 Logwood'' could find use as a tanning material. 



A similar relationship Exists between Qucrcus tinctoria, from 

 which the dye stuff " Quercitron" is obtained, and some different 

 kinds of oak used for tanning, such as Qucrcus robur, Q. pciidunculata, 

 &c., 'where, 'with the increase of the tannins, the amount of colouring 

 matters becomes less. From the tanner's point of view the cultiva- 

 tion of Laguncularia racemosa (white mangrove), which has been 

 mentioned as being found in Jamaica, should be very successful, 

 as it would be one of those very seldom obtainable exotic plants 

 which could be used for tanning light leather, and if produced on 

 a large scale could compete successfully with " Mangrove extract ;" 

 this substance, which is principally derived from the bark of a tree 

 found in the German Cameroons, produces only dark leathers. 



* See figures in Bucceeding aiTicle. — Edibyr. 



f These trees are all cultivut' d in Jamaica. — Tcrminalia Catappa is commonly 

 known as the "Almond" although it is very different from the almond of commerce. 

 There is ii native TerminaHa (viz. : T. hitifolia), called " Broad Leaf." Kditor. 



X Species cultivated in Jamaica include Ji. Globulus (iu Blue iUts.) H. citriodora, 

 E. saligna, IS. robiista, E. rodrata. Editor. 



§ See Bulletin, of tlie Department of Agncultme, Jamaica, Vol. I. Part 2, Feb. 1903, 

 pages SO, 31. Editor. 



% Algarohilla is the name given to seed-pols of Prosopis ^!;/ffi)-oin7;a, a native of the 

 Argentine Kepublic, and P. i«Ii/Jo)u, native of Mexico, a:id mountiiiuous lands south 

 to Chile. Editor. 



