58 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 58 



CONGO (Continued) 



276. FARRELL, JOHN R. The copper and tin deposits of Katanga. 



Enjr. Mg. Journ., Vol. 85, 1908, New York, pp. 747-753, maps 2, illus. 



Remarkable deposits in the Congo are being developed, and will be largely pro- 

 ductive when railway communication is available. The tin belt extends for a hun- 

 dred miles in a northeast and southwest direction from the Lualaba to the Lufira 

 rivers just north of a range of granite hills. Cassiterite has been found as alluvial 

 wash in a number of places. Wash consists of angular fragments of pinkish quartz 

 mixed with tourmaline, tourmaline schists and schorl rock. Cassiterite contains 

 from 63.5 to 65 per cent tin, unmixed with other metals. 



277. FAWNS, SYDNEY. Tin deposits of the world. 



London, 1905. Deposits of the Congo Free State, pp. 144-146. 



Tin has been found both in alluvial drift and in ledges on the. Tanganyika Con- 

 cessions in the Congo Free State about lat. 10 20' S., long. 25 13' E., and at in- 

 tervals for 60 miles northwest along the valley of the Lualaba River. Most important 

 discovery at the Busanga Tin Mine, three-quarters of a mile from the junction of the 

 Lufupa and Lualaba rivers. Cassiterite occurs in quartz veins too poor to work. 

 It is also found scattered through the residual alluvium and in the stream gravels. 



278. LACROIX, ALFRED. Mine"ralogie de la France et de ses colonies. 



Vol. 3, 1901, Paris, p. 231. 



Briefly states that tin has been found in the Congo region. 



279. STANIER, X. The geology of the Congo. 



Guide de la Section de 1'Etat Ind'e'pendant du Congo a 1'Exposition Bmxelles- 

 Tervueren, 1897, p. 269. 



Trans. Fed. Inst. Mg. Eng., Vol. 15, 1898, Newcastle-upon-Tyne and London, p. 

 496. 



" Commanders Van Gele and Roget have noticed the existence of stanniferous 

 rocks on' the Ubangi and Uelle [Djabbir], and they have also mentioned the pres- 

 ence of objects made from this metal in the hands of the natives. This fact would 

 seem to indicate the presence of workable deposits, and deserves further study, for 

 it is known that tin is a metal very easily extracted, and that its value is suffi- 

 ciently high for it to support high rates of transport." 



EAST INDIES 



280. ANONYMOUS. Tin in Singkep. 



Min. Ind. for 1897, Vol. 6, 1898, New York and London, p. 641. 



A paragraph stating that Singkep tin is to be smelted and sold as Straits tin. 



281. BENEDICT, WM. DE L. Tin in Sumatra. 



Min. Ind. for 1892, Vol. 1, 1893, New York and London, pp. 449-450. 



Tin district described. In comparing the richness of the alluvial deposits of 

 Sumatra with those of Banca it is stated that former yields at the rate of 0.348 Ibs. 

 of tin per cubic meter excavated, as against a yield of from 3 to 4% Ibs. in the 

 latter. A number of assays given. 



282. CRAWFURD, JOHN. History of the Indian Archipelago, etc. 



1820, Edinburgh, Vols. 1 and 3. 



Tin: Indigenous to the Archipelago, Vol. 1, p. 182; seldom used by natives in its 

 pure state, Vol. 1, pp. 191-192; where found, Vol. 3, p. 450; history of mining, Vol. 

 3, p. 452; parallel between the mines of Banca and Cornwall, Vol. 3, p. 464; price 

 and quantity exported, Vol. 3, p. 466; general reflections on the tin trade, Vol. 3, 

 p. 466. 



