CONDITIONS IN CONGO FEEE STATE. 231 



for trade purposes mules and oxen can be employed, and 

 an unlimited number of cattle might be reared " (p. 379). 



Theories as to the nature of the " Tsetse poison " 

 discussed (p. 379). 



" Certainly the Tsetse tends to disappear before the 

 presence of man, and the one certain cure for it would 

 seem to be the placing of all the low-lying parts of British 

 Central Africa under cultivation, and the settlement of 

 innumerable negroes. Fortunately the fly does not much 

 trouble our political economy, for the further reasons that 

 so much of the country lies above its habitat. In those 

 districts where it is healthy for Europeans to settle, the 

 altitude is already too great to permit of the existence of 

 the Tsetse-fly " (p. 380). 



146. 1897. Lieut. Th. Masui and — Seeldrayers. 



" Guide de la Section de l'Etat Indicpendant du 

 Congo a l'Exposition de Bruxelles-Tervueren en 1897 " 

 (Bruxelles : Imprimei'ie Veuve Monnom), p. 300. 



The common house-fly [Musca domestica, L.] said to 

 cause the Tsetse to disappear ! 



[Translation.] " We will not speak of the fly op 

 Europe, which is already acclimatised everywhere, and, 

 it seems, should have the advantage of bringing about the 

 disappearance of the Tsetse, that enemy of stock. . . ." 



Further on, pp. 306-310, horses, donkeys, and mules, 

 all three of which have been introduced, and cattle, goats, 

 sheep, and dogs are mentioned as existing in the Congo 

 Free State, and nothing is said as to their sufiering from 

 the attacks of the Tsetse-fly. 



147. 1897. Edouard ¥ok. 



" Du Cap au lac Nyassa" (Paris), p. 148. 



[Apud Laveran & Mesnil, " Recherches morphologiques 

 et experimentales sur le Ti'ypanosome du Nagana," etc., 

 p. 5, note 2.] 



" There cannot be any doubt as to the harmlessness 

 of the bite of the Tsetse in the case of wild animals, 

 especially buffalo and the large antelopes" (p. 148). 



According to Laveran and Mesnil the author states 

 that he was bitten thousands of times by Tsetse-flies, 

 without experiencing anything beyond very slight local 

 effects, and a feeling of irritation against the fly. 



