^l6 SCIENCE IN AFRICA 



medical department has been conspicuous. As soon as a sufficient 

 proportion of the population has received some instruction, it is 

 possible to utilize literature. 



Posters are already widely used, particularly in Tanganyika. 

 Literature is strikingly represented by The Book of Civilization 

 arranged by Dr. A. R. Paterson (1936 and 1938). This is in two 

 parts, the first on cleanliness, health, and the care of children, 

 and the second on forests, land, cattle, and improved methods of 

 farming. The cinematograph and broadcasting likewise play an 

 important part in health propaganda, but this subject can hardly 

 be drawn within the scope of the present volume, and is considered 

 more fully in Chapter XVII of ^ Survey of Africa. 



