GtfeNATIONAL 



GEOGRAPHIC 

 MAGAZINE 



Vol. XVII 



33 



MAY, 1906 



CONTENTS 



No. 5 



PAGE 



The New British Empire of the Sudan. By Herbert 



L. Bridgman. Illustrated . . . . - . . 241 



The " Break-up " of the Yukon. By Captain George 



S. Gibbs, U. S. A. Illustrated 268 



Scenes of Vesuvius and in Naples. Illustrated . 272 



The Probable Cause of the San Francisco Earthquake. 

 By Frederick Leslie Ransome, Geologist, U. S. 

 Geological Survey. Illustrated .... 280 



The Record of the Great Earthquake written in 

 Washington by the Seismograph of the U. S. 

 Weather Bureau. By C. F. Marvin, Professor of 

 Meteorology, U. S. Weather Bureau. Illustrated 296 



The San Francisco Earthquake of April 18, 1906, 

 as Recorded by the Coast and Geodetic Survey 

 Magnetic Observatories. By L. A. Bauer and J. E. 

 Burbank. Illustrated 298 



Published by the National Geographic Society 



Hubbard Memorial Hall 



Washington, D. C. 

 $2.50 a Year 25 Cents a Number 



Entered at the Post-Office in Washington, 0. C, as Second-Class Mail Matter 



