i i 2 The National Geographic Magazine 



Courtesy of Popular Science Monthly 



Map of Alaska, Showing Unexplored Areas in 1905 



made of Kiska Harbor at the request of 

 the Navy Department. Surveys were 

 also made in Resurrection Bay and in 

 Prince William Sound. A hydrographic 

 examination was made of the waters be- 

 tween Prince William Sound and Resur- 

 rection Bay at the request of the War De- 

 partment, to facilitate the laying of a 

 cable by the Signal Corps. The longitude 

 of Sitka was determined from Seattle by 

 the telegraphic method, and the work of 

 determining the longitude of other points 

 by the same method was in progress at 

 the close of the year." 



In the Philippines the charting of the 

 coasts and harbors has advanced very 

 rapidly. 



HOW MUCH IS KNOWN OF ALASKA 



MR ALFRED H. BROOKS, who 

 has charge of the Alaskan ex- 

 plorations of the U. S. Geological Survey, 

 gives the following summary of what is 



known of Alaska in the Popular Science 

 Monthly for January :* 



Explorations by U. S. Geological 



Survey 80,000 



Geologic and topographic reconnais- 

 sance surveys 60,000 



Explorations by other departments . . 50,000 



Coastal province, shore line surveyed 

 by Coast Survey and some geologb 

 cal surveys made by Geological 

 Survey 120,000 



Unmapped and practically unex- 

 plored 310,000 



Total area of Alaska 620,000 



Besides this, about one thousand square 

 miles have been surveyed in great detail 

 The above statement does not include the 

 extensive special investigations of mineral 

 resources which have been made, for 

 which about 20 per cent of the total ap- 

 propriations have been used. 



It is difficult now to realize how little 



*See contour map of Alaska published by 

 the National Geographic Society. 



