30 



REPORTS ON THE STATE OP SCIENCE. — ^1919. 



is not cumbersome, the material received from the Colonies and Pro- 

 tectorates would not be unmanageable, and the seismological study of 

 the physical structure of the earth is closely allied to the investigations of 

 structural pi'oblems by geodetic methods. This Institute would form a 

 centre to which local autliorities in the Colonies and Protectorates could 

 turn for advice or assistance. 



Such a centre would also communicate with the seismological centres 

 in other parts of the Empire, exchange data, and co-operate in the 

 study of the subject. It would also correspond with the Seismological 

 Institutes of other countries, and actively promote the development of 

 this branch of Geophysics in this country. 



Terrestrial Magnetism. 



7. There is more adequate national pro^dsion for the study of Terres- 

 trial Ma,£rne'tism than is the ca.se with Seismology, though the require- 

 ments of Terrestrial Magnetism are not fully met as yet. 



Magnetographs are in operation or are about to be established at : — 



Great Britain 



India 

 Burma 



t To 



Greenwich. 



Kew. 



Eskdalemuir. 



StonyhuTst. 



Dehra Dun. 



Alibag. 



Kodaikanal. 



Toungoo. 



be moved. ! 



Egypt . 

 Australia 

 New Zealand 

 South Africa 



Canada 



Not yet established. 



Magnetic observations at sea are made under the direction ol the 

 Hydrographer of the Navy, under whom the Superintendent of Naval 

 Compasses works. 



Greenwich Observatory, including the Magnetic Department, is 

 maintained by the Admiralty. Continuous magnetic observations have 

 been taken since 1841, and in recent years new housing and equipment 

 have been provided. The observations are published annually and have 

 been discussed at the Observatorv and elsewhere. The magnetic 

 observations made by officers of H.M. ships are received from the 

 Hydrographer of the Navy and are used with others in the preparation 

 at the Observatorv of the Admiralty Magnetic Charts. 



In the year 1871 the late Mr. John Peter Gassiot conveyed to the 

 Eoyal Society a sum of £10,000 for the purpose of assisting in carrying 

 on and continuing magnetic and meteorological observations and related 

 physical investis:ations. The proceeds of this fund, together with the 

 grant in aid made by the Treasury to the Eoyal Society for Eskdalemuir 

 Obsei-vatoiT, are now administered by a Committee of the Eoyal Society 

 for the work assigned, in augmentation of the sums at the disposal of 

 the Meteorological Committee of H.M. Treasury. 



There is, however, no provision for the collection and discussion of 

 the records obtained bv tbe magnetographs in operation in the Empire, 

 nor for the investigation of various problems in terrestrial magnetism 

 which from time to time arise, nor for the periodical revision of such 

 magnetic surveys as have been or may be made of the United Kingdom, 



