432 SCIENCE IN AFRICA 



them worthy of more serious consideration than they have re- 

 ceived. In some territories importations of high-class goats, such 

 as Alpine and Angora, have led to the improvement of local 

 strains by grading. 



Pig breeding, in common with other branches of the dairy 

 industry, has received considerable stimulus in recent years. For 

 a dairy industry that depends on butter and cheese to be fully 

 remunerative at reasonable price-levels, it is desirable to estab- 

 lish a pig industry as an adjunct (Stockdale 1937, p. 84). 

 In South Africa most of the well-recognized British breeds have 

 been introduced with success; and the same is true for Southern 

 Rhodesia, where the dairy and pig industries have recently been 

 the subject of a full economic inquiry (Southern Rhodesia 1936). 

 In the colonies, pig breeding, following the introduction of pedi- 

 gree stock from Europe, has made considerable strides, and in 

 many cases it has been found that pigs are affected less than intro- 

 duced cattle by local diseases such as trypanosomiasis. Breeding 

 has received a good deal of attention in the Iringa district of Tan- 

 ganyika during 1935 after the establishment of the Mtitu bacon 

 factory at Dabaga (Tanganyika, Veterinary, 1935, D.R., p. 31). 



The pig industry promises well in the southern territories of 

 West Africa. In the Gold Coast crosses between local *razor- 

 backed' pigs and introduced Large Whites and Middle Whites 

 produce grade pigs, which are issued or sold to breeders in the 

 Colony and Ashanti. An interesting result of breeding is the pro- 

 duction of a new type, the Pong-Tamale White, which is charac- 

 terized by fatty degeneration: 'This type has gone on producing 

 fatter and fatter progeny until the logical end — conclusion of 

 lethality from overweight and fatty degeneration — has been 

 reached and the type per se cannot be continued. This has been 

 an interesting experiment from a genetical point of view and has 

 been useful in quick-grading of the local razor-backed pig.' (Gold 

 Coast, Veterinary, 1935-6, D.R., p. 27.) In the French colonies, 

 the chief pig breeds introduced for grading local races are York- 

 shire and Berkshire, and in the Belgian Congo, Large Black 

 and Yorkshire. In the latter territory pig breeding is carried 

 on successfully in Uele and elsewhere, and it is found that the pigs 

 thrive if allowed to run wild and given a little extra food once a 



