Reviews 



Die W eltkarten-Konferenz in London im November, igog. By 

 Albrecht Penck. Zeitschrift der Gesellschaft fur Erdkunde. 

 Berlin, igio. Pp. 114-27. 



This paper states briefly what was done at the international confer- 

 ence held in London in November, 1909, looking toward a map of the 

 world on a uniform scale of 1:1,000,000. Starting with the inception 

 of the idea at the Bern meeting of the International Geographic Congress 

 in 1892, past efforts which have led to the present stage are reviewed. 

 The main features of the resolutions adopted by the London Conference 

 were: 



That all nations participate in a world map of 1:1,000,000 scale 

 with uniform symbols ; that the size of the sheets be uniform ; that each 

 sheet cover 4 degrees of latitude and 6 degrees of longitude (except 

 that north of 6o° N. lat. and south of 6o° S. lat. two or more sheets of 

 the same zone may be united) ; that each sheet have an international 

 designation, as North B 12; that the latitude of the sheets be repre- 

 sented on each side of the equator to latitude 88° by the letters A to V, 

 and distinguished as "North" or "South"; that each polar chart be 

 designated Z; that the longitude in units of 6° be represented by the 

 numbers from 1 to 60, the count beginning 180 from Greenwich and 

 proceeding from west to east; that in projection, the meridians be 

 straight lines, and the parallels be arcs of which the middle points lie 

 on the prolongation of the middle meridian; that the elevation of the 

 land be represented by a color scale using 100-meter contour division 

 lines for regions of ordinary relief. 



In addition to these leading features the recommendations treat of 

 a great many details upon which decisions were necessary in order to 

 secure uniformity of results in the completed map. 



While further consideration and conference will be necessary to 

 determine who shall make the different maps, this conference has 

 prepared the way for the adoption at an early date of a common plan of 

 operations. This important enterprise now seems to be fully under 

 way. 



R. T. C. 



