Contains among other things: Walter Busse, On the Methodology of Arable Farming in D e u t s c h - O s t a f r i k a . Special print from the German Colonial Gazette No. 10, May 15, 1907 Walter Busse, Questions of Time of Agriculture in Tropical Africa with Special Consideration of Cotton Growing. special print: Tropical Plants, Organ of the Colonial Economic Committee, 11th Vol., No. 6, 1907