158 KEPORT — 1895. 



1. Sounds fairly frequent on the coast at the most easterly and most 

 southerly portions of the district. Inland and on the northern coast they 

 are rare. This may indicate that the majority of earthquake origins lie 

 to the S.E. and are suljmarine. 



2 and 3. Sounds are rare. Many of the origins of these shocks are 

 submarine. The coast between 2 and 3 is composed of soft materials. 



-1 and most easterly part of 5. Here the coast is rocky, built up of 

 Paheozoic strata. Sounds are fairly frequent. In the southern part of 5, 

 where thei-e is much soft Tertiary material, sounds are rare. 



6. Sounds are frequent in the northern part of the district, which is 

 mountainous, while in the plain of Musashi, constituting the southern 

 part, they are rarely heard. 



7. Amongst the Palieozoic hills of the district, and extending down 

 into the plain, sound phenomena accompany about 30 per cent, of the 

 disturbances. 



8 and 9. Although the districts are mountainous, sounds are rarely 

 heard. Possibly the shocks originate beneath the ocean. 

 10, 11, and 12. Sounds are fairly frequent. 



13. Here, which is another mountainous region, sound phenomena 

 . are common. 



14. Sound is occasionally heard. 



15. Along a sandy coast bordering a plain, sound phenomena seem 

 never to be heard 



Generally sound is heard in rocky mountainous districts, while on the 

 alluvial plains it is but very rarely observed. 



Earthquake.^ which have been projxir/ated to Europe. — The object in 

 appending to the catalogue 'a list of earthquakes which was kindly drawn 

 up for me by Dr. E. von Rebeur-Paschwitz is to show that some of the 

 Japanese disturbances have travelled as far as Europe, where for minutes 

 or hours, although they were unfelt by persons, they caused movements 

 in delicately adjusted horizontal pendulums. A similar series of unfelt 

 disturbances originating in distant countries or beneath the oceans have 

 been recorded in Japan. 



IV. On the Velocities with which Waves and Vibrations are 



PROPAGATED ON THE SURFACE OF AND THROUGH PtOCK AND 



Earth. (A Compilation.) 



Introduction. 



Because the observations which have been made upon the rate at 

 which waves and vibrations are transmitted through rock and earth are 

 so varied and often apparently contradictory, it has been thought advisable 

 to select from the vast amount of material which is at our command a 

 series of illustrations from experiments upon artificially produced disturb- 

 ances, and from the records of actual earthquakes in which personal and 

 instrumental errors have been small. 



Amongst the real or apparent difficulties are the following : — • 



1. Along the same path, earth waves, originating from a powerful 



