398 APPENDICES. 



& " These woods have been much employed in the past, 



but they are now doomed to disappear sooner or later, 

 since they yield colours which are fugitive to light." 



My specimen probably came from another species of 

 Pterocarpus. It is possible it may be of use for French 

 polishing, but it can scarcely be a matter of great impor- 

 tance. It is much used about Tanganyika, to give the 

 faces of warriors and dancers a bold and ferocious ap- 

 pearance. 



Ndaiva. — The leaves are stripped and boiled, or steeped 

 for two hours in hot water. The bark-cloth make in Usoga 

 is dipped in this and assumes a dark blue colour. 



Niwa. — The bark of a tree found in Ukambane. Mr. 

 Christy says of this: "Oak-bark would give as good a 

 colour. It is very bitter and heavy, and has much resin 

 in it." 



Dyeroot. — Root used in dyeing cloth at Kituta. This is 

 probably a mordant and of no importance. 



Oilseeds. — Palm oil. — The tree is very common at the 

 north-eastern extremity of Tanganyika, and extends along 

 the east shore southwards nearly to Ujiji. I have no doubt 

 that it could be produced easily about Lake Nyassa, where 

 it is now found, e.g., on the North-western shore, and 

 also along the Zambesi river. It is possible that it might 

 pay for export from these places, but I do not care to say 

 so definitely in view of the heavy freight. 



Sesame, Bewiseed (Sesamum Indicum). — This plant is 

 abundant though local in East Africa. It is probably 

 capable of cultivation on an extended scale, but it is only 

 in very favoured localities that the value would be large 

 enough to make it a profitable article of export. 



Castor oil, cottonseed oil, &c,, could also be produced in 

 many places. 



Gums. — A specimen of gum from Kampala, which is 

 obtained from a very common tree in Uganda, " Mwafu," 

 lias a certain interest, as it was used by the Arabs as 

 frankincense in their mosques. 



