48 SCIENCE IN AFRICA 



series (farm area map), on 1,000 cape rods to i inch, and similarly 

 Natal has a i-inch (farm area), series, but for general topographi- 

 cal maps these two provinces are less well provided than some of 

 the colonies such as Uganda or Nigeria. For the Mandated 

 Territory of South-West Africa, there is an excellent 1 1500,000 

 (covering about 90 per cent of the country), compiled and drawn 

 in the Surveyor- General's Office, Windhoek. 



The Southern Rhodesia Survey and Geological Survey Depart- 

 ments have produced isolated topographic maps for land develop- 

 ment and the former has published recently a i : 500,000 and a 

 1:250,000 series. 



For Northern Rhodesia the old i : 1,000,000, published by the War 

 Office, is still regarded as the standard map, though recognized 

 to be inaccurate. The territory is also covered by a local roughly 

 compiled map on i : 250,000. This is being superseded by a greatly 

 improved and more reliable series on the same scale which will 

 embody the recent air surveys. 



For Nyasaland the old War Office pubUcations on 1:1,000,000 

 and 1:250,000 were found by the Lands Officer to be seriously 

 out of date by 1922. Information from District Commissioners and 

 others has been incorporated in a new general map on i : 1,000,000 

 and in district maps on 1:250,000, which are published locally by 

 the Lands Office. More accurate maps cannot be prepared with- 

 out a triangulation survey from which the topographical details 

 can be developed. 



The whole of Tanganyika is covered by a War Office i : 1,000,000 

 series compiled during the War from very indifferent material. 

 The Survey Department has recently done some topographical 

 work in connection with land development; so also has the Geo- 

 logical Survey Department. A series of square degree sheets on 

 the scale of i : 2 50,000 are being compiled and a number are already 

 published. 



Zanzibar Island is being topographically mapped on the 6-inch 

 to I -mile scale by the local Public Works Department and Pemba 

 Island is published on i-inch to i-mile by the War Office. 



In Kenya organized topographical surveys were begun in 1908 

 and ended six years later when the officers and N.C.O.s of the 

 Royal Engineers were recalled to their units on the outbreak of 



