Map showing Congo Forest, a broad belt of lowland tropical moist broadleaf forest, which extends across the basin of the Congo river and its tributaries in central Africa, and boundaries: international, intercolonial, provincial, district boundaries, with place names, railways, under construction, projected, roads suitable for motor traffic: all seasons, dry weather, motor tracks, tracks, telegraphs or telephones, telegraphs or telephones along roads or tracks, provinces, frontier districts, localities, mountain ranges, peaks, valleys, capes, islands, tribes, bridges, towns of 1st, 2nd, 3rd, 4th and 5th importance, rivers, unsurveyed, canals, marshes and swamps, plains liable to inundation, geodetic trigonometrical stations, altitudes in metres, depths in metres, wells, springs, waterholes, pools, historical ruins, wireless telegraph stations, limits of navigation, mission stations. Contours are at 200 & 500 metres & thence at 500 metre intervals. Relief shown by form lines with height in metres, tinted shading. Second edition. Colour. Scale 1 : 2,000,000.