9 2 



The National Geographic Magazine 



which the latitude is 47 ° 8' north, lon- 

 gitude 208 ° 2' 30" west from Green- 

 wich. Soundings in sazhens. From 

 the chart of Golofnin. 



Southwest Co?-?ier. — Chart of the east- 

 ern part of Yesso Island from Nosteki 

 Ba}' to Atkis Bay, of which the latitude 

 is 43 25' north, longitude 214 17' 

 west from Greenwich. From the chart 

 of Krusenstern. 



Northeast Corner. — Chart of a harbor 

 in the eastern part of the Kurile Island 

 Urupa, in latitude 45 56' 29" north, 

 longitude 209° 45' 37" west from Green- 



wich. Soundings in sazhens. From 

 the chart of Captain Golofnin. 



Southeast Corner. — Chart of Nanga- 

 saki Bay, situated in Kiuziu, one of the 

 Japanese Islands. Latitude of Megaski, 

 32 44' 50" north, longitude 230 7' 20" 

 west from Greenwich. Variation of the 

 compass, i° 45' 30" west. Soundings 

 in sazhens. From the chart of Captain 

 Krusenstern. 



Sheets 27-33. Entitled, "View of 

 the shores and islands situated in 

 Okhotsk Sea and in parts of the Pacific 

 Ocean." 



MAGNETIC SURVEY OF THE UNITED 



STATES* 



By Dr. L. A. Bauer, Chief of Division of Terrestrial 

 Magnetism, Coast and Geodetic Survey 



IN the ' ' Plan for the Reorganization 

 of the Survey of the Coast, as 

 adopted by a board convened on 

 the 30th of March, 1843, by direction 

 of the President of the United States, ' ' 

 explicit provision is made for the mak- 

 ing of ' ' all such magnetic observations 

 as circumstances and the state of the an- 

 nual appropriations may allow. ' ' Since 

 then Congress, by more or less generous 

 appropriations, has distinctly recognized 

 the importance of this feature of the 

 work of the Survey. 



Under the first Superintendent, Prof. 

 F. R. Hassler, the magnetic declination 

 ( ' ' variation ' ' ) was supplied on the Coast 

 Survey Charts, as determined with the 

 aid of the ordinary nautical instrumental 

 means then in vogue. 



The real magnetic work of the Sur- 

 vey, however, may be said to have com- 

 menced with Professor Hassler's suc- 

 cessor, Prof. Alexander Dallas Bache. 

 Professor Bache had previously made a 



magnetic survey of Pennsylvania, which 

 was not followed until in quite recent 

 years by the magnetic surveys of Mis- 

 souri, New Jersey, Maryland, and North 

 Carolina. He had likewise established 

 the first magnetic observatory in this 

 country — that at Girard College, Phila- 

 delphia — and, while on a trip abroad, 

 had made a series of magnetic observa- 

 tions at various places. 



Improved magnetic instruments were 

 now imported, and the expert aid of 

 Dr. John Locke, of Cincinnati, and 

 Professor Renwick, of Columbia Col- 

 lege, was temporary employed. The 

 three magnetic elements — declination, 

 dip, and intensity — were determined at 

 various places, chief!}- along the sea 

 coast. 



The work of magnetic observation, 

 thus fairly started, has since been pros- 

 ecuted without interruption over the 

 entire country, including Alaska and 

 the Hawaiian Islands, as well as in some 



* Abstract of an address before National Geographic Society January 24, 1902. 



